[quote name='Gameboy415']Um, those are all PS
2 games.... :lol:
My list:
-Tomba!
-Tomba 2: The Evil Swine Return
-Klonoa: Door to Phantomile
-Castlevania: Symphony of the Night
-Chrono Cross (I would've picked Legend of Mana, but I enjoyed CC a bit more)[/QUOTE]
I would definitely have to say those are the 5 I would have say hold up the best today too. The Tomba and Klonoa games are not to be missed and are some of the most unique platformers I've ever seen. SoTN really is the best in that whole series and the ones after it haven't really come close to it. I liked how they did that throwback to the final stage of Bloodlines at the beginning and really wish they'd do something like that again. Also, with that game I am probably in the minority who liked the ending vocal "I Am The Wind", the jazz piece. I was greatly disappointed they removed it from Dracula X Chronicles

Chrono Cross is excellent and I enjoyed it more than Chrono Trigger. I feel with that game they realized more of the concepts, ideas, and storyline they had envisioned for it.
To be fair, there were a LOT of niche lesser known RPGs for the PS1 so I won't list those as per the OP's request but they are almost all worth checking out if you can find them and several of them hold up well today.