I'm really busy, so I hope you won't be offended if I put up something quick and dirty from my file of favorite faces. These are all good subjects to draw, I just don't have the time to comment on them adequately.
I'll start with Victor Mature (above). Now THERE'S a face! A vertical brow (most men have diagonal brows), ears that stick out at the bottom, deep-set eyes with heavy, dramatic lids, big lips, masculine jaw...it's an interesting combination of features.
One of these days I'll have to do a post about Chaplin's partner, Eric Campbell (above). In the Mutuals shorts Chaplin and Campbell are a team. When Campbell died in an auto accident, Chaplin had to stop making funny shorts. His slapstick style depended heavily on Campbell as a foil, and it just wasn't possible to continue further down that road without him.
Campbell (above, without make-up) was a real pro with long stage experience in the same innovative group that the young Chaplin belonged to.
Here's (above) proof that Wally Wood-type people actually exist. This man even looks like Wally Wood!