It's a bit more difficult for some of us on here to recall b/c most private servers don't play with progressive itemization.
Dire Maul, for instance, adds a bunch of great pre-raid items, and later patches upgrade existing blue dungeon items to make them better.
Rogue is definitely good, the warrior set is fine, the mage/priest and maybe warlock sets are fine.
Though to be clear, if you are shooting to make these sets more optimized, you would mix mage/warlock sets, 4 pieces each, for 4-piece set bonus on each that gives bonus spell dmg.
But the sets for hybrid classes are hot trash.
Gensei - Shaman
Temaius - Paladin