Well you said no multi-plat I know :D But I haven't seen mention of Timesplitters Future Perfect. That game is so bad-ass.
Huge honorable mention to Zone of Enders 2, that game is friggin intense sometimes :D
Odin's Sphere
Ratchet and Clank obviously
Dead to Rights was pretty good
Xenosaga I found to be a pretty good, Very traditional with a HUGE emphasis on story. But slightly on the JRPG side with it's story.
Twisted Metal Black was awesome :P
Fatal Frame was tasty :D
Disgaea is friggin sweet :D
Theres a bunch more but I can't quite put them here at work :D I'll get carried away!
From 0 to KICKASS in .stupid seconds.