SSI were a great RPG developer on the Amiga. Eye of the Beholder is still my favourite game from them.

Pool of Radiance was also a great game and the direct PC sequel to it, "Pools of Radiance: Ruins of Myth Drannor", released in 2001 is another of my favourite RPGs, using a Baldur's Gate style 3D engine. If you haven't tried this PC sequel I highly recommend it as it also using the same AD&D 3rd edition rules as BG and is very good, but do make sure you patch it with the latest available patch as it was quite unstable until the last patches were released.