I know I've been a big fan of
Nathan Petrelli Adrian Pasdar as Marcone, but after watching the
Castle rerun "Heartbreak Hotel" today, I'm agreeing with the opinion that Richard Burgi could do a good job. He plays a casino boss in the episode, and comes across very Marcone-like.
Pair him up with John Cena as Hendricks...
...then we cast Alyssa Sutherland as Gard...
...and Angie Harmon as Helen Beckitt, and we're good to go.