So many to list…. I think that most of the best gay porn (even if they are straight in their personal lives) butts in recent years belong to the "amateur" site boys vs the studios:
Sean Cody Coleman Sean Cody Spencer
Corbin Fisher Tanner (aka Phillip Anadarko, Fratmen Marco)
Fratmen Riley (aka Lincoln Hawk)
Just to name a couple!
I second Spencer from Sean Cody. Miss him a lot. That smile when he's being fucked too…