Issac has the best lvl 1 IMO 2 Shots. Hited by the first, sure kill on second. Hit on second, dead.
Almost impossible to fail 1 kill, getting 3 thats another thing...
Sly currently has the best level 1, almost unarguably.
No, post patch I don't know how anybody can even try to argue that. Maybe its still one of the better ones for FFA, but it just isn't easy enough to confirm to be considered great in any competitive mode now that its not hard to interrupt.