Here is a very cheesy, yet fun Hitmonlee set that works on HO teams, especially if you stack Fighting-types:

Hitmonlee (M) @ Liechi Berry / Focus Sash
Ability: Unburden
Tera Type: Fighting
EVs: 252 Atk / 252 Spe
Adamant Nature
- Reversal
- Upper Hand
- Endure / Swords Dance
- Knock Off
The combination of Reversal and Upper Hand is the main gimmick of this set. The insane power of Reversal at 1 HP (which is 200 BP for those of you who didn't know) means that only immunities and extremely bulky resists could stand up to it. Upper Hand is a +3 priority move that guarantees flinch, but only if the opponent is using a priority move. Since the move is so rare, I almost always get people with it, but if it gets more popular then it becomes more of a 50/50 mind game. It also helps that a lot of the priority users in the tier are weak to it or uses First Impression for Slither Wing's case. Use Fighting Tera to boost both moves, especially Reversal which even when resisted deals about the same damage as a non-STAB super-effective move.
I run 0 defensive EVs and IVs to ensure that Hitmonlee is knocked to 1 HP as often as possible. The choice between Endure + Liechi Berry vs SD + Focus Sash depends on how much you want to cheese. Endure is more reliable, but a +2 max power Reversal can output very impressive damage like one-shotting max defense Mew after SR or max defense Slowbro after SR and 1 layer of Spikes
Counters to this set are Ghost-types, (especially priority users like Mimikyu or Aqua Jet Basculegion), Swift Swim and Chlorophyll users, and bulky x2 and x4 resists like Fezandipiti, Slowbro, and Enamorus. But the biggest counter to tis is if your opponent decides to burn or poison or status you instead of attacking you to Reversal range, then you are essentially down a Pokémon. This scenario would definitely be more common if the broken offensive Pokémon that this set baits like Hoopa get banned. Just use SD White Herb CC or Mienshao/Terrakion/Lucario/Slither Wing if you want to win more. Fighting types are in a really good spot, so I might make a another post on Fighting-spam teams if I'm not lazy.

Hitmonlee (M) @ Liechi Berry / Focus Sash
Ability: Unburden
Tera Type: Fighting
EVs: 252 Atk / 252 Spe
Adamant Nature
- Reversal
- Upper Hand
- Endure / Swords Dance
- Knock Off
The combination of Reversal and Upper Hand is the main gimmick of this set. The insane power of Reversal at 1 HP (which is 200 BP for those of you who didn't know) means that only immunities and extremely bulky resists could stand up to it. Upper Hand is a +3 priority move that guarantees flinch, but only if the opponent is using a priority move. Since the move is so rare, I almost always get people with it, but if it gets more popular then it becomes more of a 50/50 mind game. It also helps that a lot of the priority users in the tier are weak to it or uses First Impression for Slither Wing's case. Use Fighting Tera to boost both moves, especially Reversal which even when resisted deals about the same damage as a non-STAB super-effective move.
I run 0 defensive EVs and IVs to ensure that Hitmonlee is knocked to 1 HP as often as possible. The choice between Endure + Liechi Berry vs SD + Focus Sash depends on how much you want to cheese. Endure is more reliable, but a +2 max power Reversal can output very impressive damage like one-shotting max defense Mew after SR or max defense Slowbro after SR and 1 layer of Spikes
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 252 HP / 252+ Def Vileplume: 271-319 (76.5 - 90.1%) -- guaranteed OHKO after Stealth Rock and 1 layer of Spikes
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 252 HP / 204+ Def Chesnaught: 440-518 (115.7 - 136.3%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 0 HP / 0 Def Noivern: 408-480 (131.1 - 154.3%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 252 HP / 72 Def Slither Wing: 377-444 (100.8 - 118.7%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 0 HP / 0 Def Gardevoir: 240-283 (86.6 - 102.1%) -- 93.8% chance to OHKO after Stealth Rock
+1 252+ Atk Hitmonlee Upper Hand vs. 0 HP / 0 Def Mamoswine: 398-470 (110.2 - 130.1%) -- guaranteed OHKO
Bisharp, Crawdaunt, Lucario, and Lycanroc are all also OHKOed
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 252 HP / 204+ Def Chesnaught: 440-518 (115.7 - 136.3%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 0 HP / 0 Def Noivern: 408-480 (131.1 - 154.3%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 252 HP / 72 Def Slither Wing: 377-444 (100.8 - 118.7%) -- guaranteed OHKO
+1 252+ Atk Tera Fighting Hitmonlee Reversal (200 BP) vs. 0 HP / 0 Def Gardevoir: 240-283 (86.6 - 102.1%) -- 93.8% chance to OHKO after Stealth Rock
+1 252+ Atk Hitmonlee Upper Hand vs. 0 HP / 0 Def Mamoswine: 398-470 (110.2 - 130.1%) -- guaranteed OHKO
Bisharp, Crawdaunt, Lucario, and Lycanroc are all also OHKOed
Counters to this set are Ghost-types, (especially priority users like Mimikyu or Aqua Jet Basculegion), Swift Swim and Chlorophyll users, and bulky x2 and x4 resists like Fezandipiti, Slowbro, and Enamorus. But the biggest counter to tis is if your opponent decides to burn or poison or status you instead of attacking you to Reversal range, then you are essentially down a Pokémon. This scenario would definitely be more common if the broken offensive Pokémon that this set baits like Hoopa get banned. Just use SD White Herb CC or Mienshao/Terrakion/Lucario/Slither Wing if you want to win more. Fighting types are in a really good spot, so I might make a another post on Fighting-spam teams if I'm not lazy.