Elminster
Elminster is an old-ass wizard from Forgotten Realms, oft-cited as one of the main reasons why that setting sucks shit. He's powerful enough to solve any problem that would challenge PCs, and no real reason not to do so which isn't utterly contrived. He's an Urza figure without the apathy or plane-ruining fuckups. Oh, and he's also Ed Greenwood's self-insert, the original Mary Sue or Faerûn from be for Drizzt was a thing. He banged the goddess of Magic, to boot.