Umm... It depends on how deep you want to go, and how user-friendly game you expect.
Speaking on above,
Bard's Tale and
Might and Magic are quite user-friendly series, if you are ready to draw endless mazes and remember some (not very much) spells. Dungeon Master seems in the same vein, but I am not sure, I didn't play it. Unlike
Wizardry that totally
not recommended, as it have
a lot of everything, from loot to class synergy and special spells.
On the other hand, if you are want more eye-candy, you can skip year or two, and went right to 1990-91, where choices are multiple:
-
Dark Spyre - simple but addictive dungeon crawler with a lot of options. Funny, but this type of gameplay after start of 90s on PC was repeated first time only in Diablo - and with heavy weighted to loot and random gameplay, it became totally different.
- Ideas of Dark Spyre was developed in two more Event Horizon games:
Dusk of the Gods and
The Summoning. Both are "puzzle-dungeons", similar to Dark Spyre, but more advanced and with heavier plot. Unfortunately, third game with the same engine,
Veil of Darkness failed to get my attention. It's too plot-related, and too unforgiven for errors. Not my thing.
-
The Legacy. Interesting horror-RPG hybrid, but demanding sometimes in action sequences.
Hmm, actually, in this time frame I cannot found nothing more.
Well, there is always
Nethack and
Rogue, and I heard that all
Ultimas are great... but I never tried any.
Well, after checking Moby, I can name several more, but they are somewhat not exactly what you need:
-
Dark Heart of Uukrul. Spell reference is heavy needed, but you have automap!
-
Darklands. Again, heavy depends on manual, but intuitive in many other places.
-
HeroQuest. It's more strategy than RPG. Fun, but different.
Hmm, that's all for me. More fun games in later years though.