In my opinion from what i've seen..This is S Tier (Ratchet is not in S Tier but he is at the top of A Tier)
I disagree with Dante and Radec. Maybe in the "A" or "B" tier.
Sackboy, Ratchet, Evil Cole would also go into the "A" column. Of course this my opinion on a game that hasn't been out long enough.