This set was used in my new team I made today, and it has swept 5 teams. It didn't need any support at all, and it wasn't the center of my team. I know I submit many of these that are rejected, but I'd say this is my favorite. The idea is to set up on something like Celebi (which I've seen a lot of), then sub.
http://www.smogon.com/dp/pokemon/dragonite
[SET]
name: Sub Dancer
move 1: Substitute
move 2: Dragon Dance
move 3: Dragon Claw
move 4: Superpower/Brick Break
nature: Adamant/Jolly
item: Leftovers
evs: 4 HP/ 252 ATK/ 252 SPE
Why this set deserves to be on-site:
-It is so easy to set up on many things. With excellent typing, you can come in on something to support a team, like Bronzong, Skarmory, Celebi, or Blissey. Then, you pretty much get 2-4 kills on average.
-Very effective
-Counters priority and status
-Prevents your team to get swept
Additional comments:
-Set up sub on first turn. Then proceed to DDance.
-Can take on Weavile behind a sub, as well as Mamo.
-Two DDances is all you need. Then you can get OHKO's on many things.
-Hail/Sandstorm safe
-Very difficult to stop after getting up a sub. Priority is only a problem if you DDance instead of kill the pokemon.
-Perfect coverage with Dragon/Fighting.
Teammates and counters:
-Enjoys any entry hazards, mainly SR.
-Sandstorm and Hail aren't a problem, so such teams accept it.
-Starmie can help by eliminating rocks and killing Infernape.
-Metagross OHKO's Flygon and Starmie with Meteor Mash and Thunderpunch. Also can take on Gyarados.
-It works best when switched in after a kill on your team. Momento helps a lot.
-Hates Infernape with HP:Ice
-Starmie can be annoying.
-Flygon with a scarf kills Dragonite without a sub.
-Gyarados is a tad faster and can kill with stone edge. Be sure to bring Dragonite in first.
-Prioirity can break subs and sometimes even kill it.
Well that's my set. It does work great, and can always work as back up.

http://www.smogon.com/dp/pokemon/dragonite
[SET]
name: Sub Dancer
move 1: Substitute
move 2: Dragon Dance
move 3: Dragon Claw
move 4: Superpower/Brick Break
nature: Adamant/Jolly
item: Leftovers
evs: 4 HP/ 252 ATK/ 252 SPE
Why this set deserves to be on-site:
-It is so easy to set up on many things. With excellent typing, you can come in on something to support a team, like Bronzong, Skarmory, Celebi, or Blissey. Then, you pretty much get 2-4 kills on average.
-Very effective
-Counters priority and status
-Prevents your team to get swept
Additional comments:
-Set up sub on first turn. Then proceed to DDance.
-Can take on Weavile behind a sub, as well as Mamo.
-Two DDances is all you need. Then you can get OHKO's on many things.
-Hail/Sandstorm safe
-Very difficult to stop after getting up a sub. Priority is only a problem if you DDance instead of kill the pokemon.
-Perfect coverage with Dragon/Fighting.
Teammates and counters:
-Enjoys any entry hazards, mainly SR.
-Sandstorm and Hail aren't a problem, so such teams accept it.
-Starmie can help by eliminating rocks and killing Infernape.
-Metagross OHKO's Flygon and Starmie with Meteor Mash and Thunderpunch. Also can take on Gyarados.
-It works best when switched in after a kill on your team. Momento helps a lot.
-Hates Infernape with HP:Ice
-Starmie can be annoying.
-Flygon with a scarf kills Dragonite without a sub.
-Gyarados is a tad faster and can kill with stone edge. Be sure to bring Dragonite in first.
-Prioirity can break subs and sometimes even kill it.
Well that's my set. It does work great, and can always work as back up.