Here are some of my ideas:
Nightblade- Ranger with pet
Skill line focused on bow used with conjunction with a pet (cat, bear, or wolf)
Templar- Spear/Lance
Skill line focused on brutal physical attacks with emphasis on AOE
Sorc- Warmage
Skill line focused on shields and melee attack bonuses with close range magic damage.
Dragon Knight- 2Handed hammer/Berserker
Skill line focused on stuns and AOE damage through earth magic.
Warden- Druid/Shapeshifter
Skill line focused on changing form and gaining form specific abilities.
We don't need a new class, just more variety with the ones we already have.