Comment on Sly Cooper: Thief of Virtue by ConnorDavidson
Well now, that's a tough but great question. I'm hesitant to choose because A) I have decent knowledge and insight to the vast array of great actors in the world, but not as much as I should, and B) such a declaration could ruin some people's imaginations...which may or may not be better than my own.
While I work up a list, why don't some other people give me ideas? I'll share mine if you share yours...heh. 
Lady Venom: Tara Strong
Kevin Turbo: Kevin Michael Richardson
Master Kre: James Sie
Cesar DeRoque: Sam Vincent
Colonel Zahn: Clancy Brown
Drake Lupus: Adam Baldwin
who would voice captin snow
Had that list ready didncha? I like your ideas (though I did have to look one or two up to refresh my memory.)
Actually, I was considering Clancy Brown as Zahn, though I was also looking for a slight German accent. And Kevin Michael Richardson for Turbo too. Heh. Maybe there's something there... Here's a few of the ideas I had in mind...
Kevin Turbo: Kevin Michael Richardson, Fred Tatasciore; Brutish and speaks in Spanglish/Ghetto lingo
Master Kre: I have no idea...there are tons that would fit, yet I can't figure any names; Cold and arrogant, doesn't necessarily have to be Asian.
Cesar DeRoque: Tom Kenny, Seth Macfarlane, any comedic guy with a distinct/slightly annoying/ high voice; Pompous, nasal, takes himself seriously even as others can't. Probably a poor idea...I like yours better.
Lady Venom: Tasia Valenza, Kelly Hu, there are a few more; A soft and seductive voice, but often grows cold and cruel.
Colonel Zahn: Clancy Brown, Liev Schreiber, Corey Burton; Deep and signature voice, slightly accented and very menacing.
Drake Lupus: Will Arnett, Benedict Cumberpatch ('cause I can!), Gary Oldman...I'm using bigger names here, because Drake needs a strong voice, sinister and calculating, yet, must still illicit strong sympathy and emotion. Actually, Adam Baldwin works too.
My pathetic list. Don't take any real stock into it. Leave the casting to the casting directors. That's what they're there for.
Don't misunderstand me - I think Tara is an awesome actress, and I love her whether she's playing a young boy or an actual woman. (She plays an awesome Risha in SW:TOR, but then, lots of people are awesome in that). She may very well be the right person for the voice - in fact, I think I'll hire you on as one of my casting directors...
i love those guys