Iconic from the system?
Or Iconic and i assosiate them with the system?
With the latter it's only Crash for me as iconic.
I assosiate him with every PS console even if he isn't exclusive anymore honestly. He was their first mascot... and outside of Lara Croft is the only character from a sony platform i'd expect a random non gamer being able to pick out of a lineup. He was there first Mascot.. and really... only Mascot. Sackboy seems like a replacement but it will take a while... or some annoying commercials to replace Crash. Man his commercials sucked... and stuck in your head.
Lara Croft i don't assositate with PS probably because it's my Aunt's favorite series of games and she loves the 360. Though I suppose i should as she's probably the only character that qualifies as a true Iconic character from a Sony platform.
In a real Icon sense there are probably only 2-3 characters in gaming. Lara Croft, Mario and possible Master Chief just through force of advertising.