I think Pitbull would own all of Team Alpha Male - Mendes, Dillashaw, and Faber. He's a fellow short stuff with good grappling but more advanced, natural striking accompanied by even more power. I loved that last over-hand right against Curran. Pitbull walked into the pocket, baited Pat to be offensive, then ducked down and let it rip with full leverage. That would have knocked out the high majority of fighters, including probably Dillashaw, Faber, and Mendes; who have been ko'ed themselves. Never happened to Pat, though. He's not as tested, but seemingly can take a strike because of how big he is for the division and his recovery training.
But I don't see Pitbull beating Aldo. Aldo would use his superior reach, kicks, and speed to stay on the outside, score, make Pitbull chase him, and ultimately tire him out. I think Paddy Mike would be the more interesting match-up there for his ability to fight on the outside given his jabs and kicks, as well as his cardio. But he'd still be highly likely to lose, especially given his nervousness. The moment could be too big for him.
Hopefully Bellator doesn't have that much longer so we can see these match-ups like these and the many quality fighters in the organization get their long overdue respect from the mainstream.