This can be for games with a Job System or a designed Class.

For example....

The Best Red Mage is FF3's. I played through the whole game with it. It can keep up in terms of damage with most everyone else but can also supply healing and has better defense than the other mages.

Meanwhile, I think FF3 has the worst Dark Knight. Souleater is nice and all but losing 200 HP to damage a boss is guaranteed death if the boss uses a magic attack on your DK. And other than Souleater, they don't bring much to the table.