Oh, cool, that's a lot of stuff to check out! Will surely try out a few of those, thanks!
Ok so first person type dungeon crawlers from that era. You have Dungeon Master 1 & 2. Elder scrolls 1&2. Might and Magic series (10 games) Wizardry series. Amulets and Armor, Anvil of Dawn, Ultima Underworld 1&2, Hexx Hersey of the Wizard, Bards tale series. There is many more out there and plenty of obscure ones. Some of those games are free roam real time others are step based.
Most of that list is 80s/90s games. There are plenty of modern games in these styles also.