Top 20? That's a longer list than I have time for... and more thought than I care to put into it so I'll just throw some names out
1.) Nation Fillion - The subject of my mancrush. Not only is Nate an endlessly entertaining actor but he's just an all round cool dude.
2.) Chris Pratt - Like Fillion, Chris is super fun to watch and also the coolest bro irl who does awesome charity work for kids n' stuff.
3.) RDJ - The one, the only Robert Downey Jr. I have endless respect for anyone who can overcome crippling addictions and remain a superstar and all round cool guy.
4.) Ava Green (and her banging titties) - It's kinda challenging to find actresses in Hollywood who are both talented and freakishly hot. Mrs. Green has no end of phenomenal talent. And she's freakishly hot.
5.) Charlize Theron - As Mad Max Fury Road clearly demonstrates, even bald and slathered in engine grease blood and dirt Mrs. Theron manages to be crazy hot and phenomenally talented. Theron's range and versatility is impressive. And she's a total babe.
6.) Keanu Reeves - Who's one of the drop dead coolest action heroes ever? Yeah, this guy. People who know him say Keanu is just one of the most down to earth guys you'll ever meet.
7.) Robin Williams - One of my long time favorites. What else can be said about this immortal legend? Williams has one of the widest ranges of any actor and is beloved by millions.
8.) Gene Wilder - One of the funniest human beings who ever lived.
9.) Samuel L. Jackson - It's the original BAMF. nuff said.
10.) Ian McKellen - That's SIR Ian McKellen to you!!
11.) Patrick Stewart - who is totally not a vampire.
12.) Harrison Ford - who should be higher on this arbitrarily numbered list but I'm not going back to reformat this post so @#$% it. Han Solo, Indiana Jones, Rick Deckard, Jack Ryan and like a bajillion other iconic roles.