The ones I am most familiar with are Bogart and Stewart, the others I've regrettably not gotten around to seeing in anything. Of those two, I'd go for Bogart. The man personified Jerk With A Heart of Gold characters (much like how Harrison Ford is such for my generation and my preceding one, IMO), and did it masterfully. There's a reason he's often considered Hollywood's all-time greatest leading man. That, and his romance with Lauren Bacall was an inspiring and beautiful thing. But that's of course a real-life thing...