Mike Pollock - This guy has such great energy and every role he's played is dynamic. I can't think of one role he's done where he not only sounds below the bar, but doesn't raise it.
Sean Schemmel - He INVENTED hot-blooded, man! If there's one VA who belongs in this thread, it's him. Anyone who watched DBZ as a kid can attest to this much.
Vic Mignogna - Who better to voice the main character of FMA than a total fanboy of it? His Edward was a radical departure from Romi Paku's version, but man if it wasn't just as effective. Maybe even more so.
Ryan Drummond - His only real role was playing Sonic in the Dreamcast games, but I feel like I should count him anyway. I swear he bleeds passion.