I don't think you want to overdo the classes. In many resent games, classes have been to specific forcing you to play it one set way. But I think that's wrong. Classes should be broad and allow for many different types of game play. Gypsy, Ninja, Assassin, Thief... these are all specific titles, but all belong under the same class. Rogue. Then depending on how you play / RP that class is how the class develops.

Same goes for the weapon master, warrior, non-spell casting knight, simple. Fighter. Spell casting knight with a bent towards evil, Shadow Knight. Spell casting knight with a bent towards good, Paladin.

Just about everything can fit under some sort of general tag. The trick is keeping everything at one specific level. You don't want to go too specific or too general. You want to provide people with the same basics but allow them to branch off and while they are the same class, be able to keep their identity as a person.

I mean who here hasn't felt like they are just an interchangeable cog in a machine that any other one of your class could do just as well. Giving people the option to branch out allows people to create a character that others cannot easily duplicate. WoW sort of did this with the different skill traits, but they were still too specific and I didn't like the idea of skills being the main difference of who you were. Seemed to fickle.

For me the best class system is one where you choose your class but depending on where and how you gain experience your skills appear differently. With no specific one being the better.

As for the names well This is my list, obvious ones first:

Warrior
Paladin
Blackguard
Monk
Cleric
Druid
Necromancer
Wizard
Sorcerer
Rogue
Ranger
Shaman
Bard
Enchanter

Brawler: a class that fights like no other, sending himself into the fight, he himself is the weapon. Armor Class directly influences this characters attack ability. Think : Thibbledorf Pwent of the Gut Buster Brigade. Could be a variation of the monk or warrior but doesn't really fit in either.

As for class ideas well, I could write pages on the abilities of each. But you get the idea I am sure.