Here's a lesser known actor, Matthew G. Taylor naked. He's a big and muscular dude that obviously spends a lot of time in a gym. This Matthew G. Taylor full frontal comes from the show 'Queer As Folk'.
In the film 'The Overnight', Jason Schwartzman got nude and showed his big hairy penis. The actor has a big cock and has been hiding it his entire career. You really have to see this thing, it's incredible.