I will muddy the waters a bit more. I have a sniper who, personality wise, would find a brawl in the bar an annoyance & not worth the effort of drawing a weapon unless his life was threatened. However, I consider him a combat/stealth character because he defines himself as a killer & would probably trade his whole team is for a nice 5mil nuyen pricetag.

That doesn't muddy anything. He's a sniper by profession. That means that he is, in fact, a combatant by trade.

I would define sniper as a combat role not dissimilar to designated marksman.
Not assassin, though, as poisoning someone's food is an example of a non combat assassination.

What about an adept assassin that throws poisoned hot dogs?

Wireless bonus: hot dog separates mid air (treat as narrow spread).

Dang, I forgot to use contact poison on the hot dogs, and none of the baddies are eating them!

He specializes in Barghests.

Barghests or baguettes?