BG 1 & 2 were definitely developed by bioware, interplay was the publisher. Interplay (black isle studios) developed icewind dale and planescape:torment, which were based on bioware's infinity engine. NWN1 was bioware and NWN2 was obsidian (came from black isle studios).

Source: memory and crawling through wikipedia articles

That's not correct. Interplay published Baldur's Gate, but BioWare developed it. See https://www.pcgamer.com/the-history-of-baldurs-gate/.