An interesting point in that discussion is that instead of looking for Ubers to drop y'all should look for low-tier mons that could be viable since 95% of the mons are allowed in OU
Ok so here is tera-fire Hawlucha!!!
I played it after sneasler ban, and it was cool, and he can sweep if you put it on the wright time, thanks to U-Turn Rillaboom. However, it can be hard to setup against lost of mons, and without attk boost, it doesn't hit hard at all. Dondozo completely wall it off course.
Opposing Tusk and Rilla are free setup but... that's all. Ogerpon does too much damage and can crit (but the opponent may switch out), alo can burn (if you don't tera), toxa can haze, ting lu can whirlwind, zam can tera and id, special mons can ko, samurott-h can crit with water move.
So... it can be hard to use it but with tera fire it can work, and setup against ceruledge, cinderace, heatran and enamorus (if you tera at the turn they do magma/moonblast).
However, weak to aqua jet and revenge killed by sucker punch gambit after tera or cc drop.
Off course, we use tera fire to ko gholdengo, and tera blast is not a contact move so you're not statik by zapdos if you use it.
You can also use tera elek to be immune to t-wave and beat zapdos more easily (except if the opponent has the strange idea to heat wave burn, or if hurricane confuses) and do more damage to pex.
Ghost is an option to beat ghold and be immune to espeed (which may ko you after some cc drop without tera ghost) and body press, but it makes you weak to wisp, t-wave and sucker punch.
Dark is an idea too, so you still resist sucker punch after tera and you beat ghold after sd, but you keep fairy weakness.
Here is the set and a game I won with it:
https://pokepast.es/4aa783feafb581da (outspeeds dragapult scarf, perhaps you can find better Evs ideas)
https://replay.pokemonshowdown.com/gen9ou-1994767083