May I ask you, what you intent to accomplish? Requesting weird Pokemon for an OU team, doesn't sound like you're even trying to win. If you just want to battle some noobs, who don't know how to Pokemon, though, you could have told us earlier, because that's completely different. :P
If you want to win in OU -> use stuff that's somewhat viable in OU
if you want to mess around in OU -> use stuff, that's either niche, or can work out to a certain extend, given the right support
if you just want to play with weird stuff -> just forget about tiers entirely, but also don't ask for Pokemon to use in a certain tier
If you opt for the third choise:
- Chimecho (Support)
- Phione (Rain Setter, "Sweeper")
- Relicanth (Tank)
- Rotom-Frost/Fan/Normal