I think it's telling that a lot of these were kits. So many ultra-niche variations.
I've certainly thought about playing a cleric or bard that doesn't fight, but works solely support. But the Pacifist Priest cleric kit, in exchange for being forbidden from causing harm and not even being able to wear armor, all they get is a +2 bonus to their charisma and a +2 bonus to their reaction score. Not exactly an even exchange, that.
I never came across the anchorite kit before, but that is an astonishingly strict limitation.
I would love to play a beggar, but the Stormbringer beggar class is probably my favorite iteration.
Now, of the actual classes, my vote would be for the 1e thief. The thief is in theory a great class, but they spend a large amount of their play time being terrible at the things they're supposed to be experts in. A 3rd level thief being sent down the hall to check for traps is probably being sent to their death if there is a trap. At most, a dwarven thief has a 45% chance to find and then a 45% chance to disarm the trap. Less than half the time, the PC with d6 HP will be successful at their job.