I know it's not classic, but...

[Gloomlord]

Wizards would also be the weakest in the game if it were not for raiding. They're essentially just a class for making money, mobilisation and getting people to PoH and PoS.

I think I'd honestly prefer a 2nd paladin in a group if I wanted a dedicated rooter and stunner. They can at least provide better sustained damage over time with a good 2 handed weapon and a haste item. That should put in perspective just how useless they are.