Tom-Tom, One Eye (and Silent?). Thulsa Doom/Thoth-Amon etc. Ged. Rincewind. Most wizards in Dying Earth. Circe, Morgan le Fay. Dallben. Most of the Wizards Fafhrd and the Gray Mouser ever meet. Others too obscure to mention.Kishin said:Again, the Mouser is not a wizard. Gandalf is a divine being. Belgarion is a Mary Sue. So is Richard Cypher. In fact, Richard Cypher is probably the President of the Mary Sue club. Rand Al'thor is more Sorcerer than Wizard by 3E and 4E standard, since his power is instinctual rather than trained, but I'd suppose it's agreeable though again, fairly Mary Sue.
Wizards that don't fight: Saruman, Elric off the drugs/pre Stormbringer. (Standard Elric is admittedly a fighting wizard). Sephrenia from Eddings' Elenium/Tamuli. Polgara. Belgarath. Quick Ben Delat. Khelben Blackstaff. The standard Wizard types in the Dark Glory War series.
Doctor Strange, Willow and TV version Harry Dresden (only because I havent read the books) who are perfectly capable of throwing a punch or shooting a crossbow, but you don't tend to see them running around with swords or taking on anything tougher than some mook with a sharp spork without magic. (Admitadly, Doctor Doom, Giles and Morgan do run around with such weapons, but whatever.)
(I'm tempted to say Vaarsuvius, but I'm pretty sure V doesn't count)