Absol / Mega Absol ![enter image description here](https://cdn.bulbagarden.net/upload/7/7c/359MS.png)
Learns Baton Pass and Swords Dance, and if you invest 252 HP, it can take some hits.
Celebi ![enter image description here](https://cdn.bulbagarden.net/upload/5/5a/251MS.png)
Learns Baton Pass and Swords Dance, can only take neutral or restistant hits though, horrible typing.
Mienshao ![enter image description here](https://cdn.bulbagarden.net/upload/e/e4/620MS.png)
Learns Baton Pass and Swords Dance, has a good HP stat to take hits.
These three are the only ones (except for Mew) I would use in UU, it just comes down to which one synergises best with your team.
Source - Showdown's /dexsearch.