Barbarian 11
Bard 23
Cleric 18
Druid 16
Fighter 20
Monk 13
Paladin 17 Ranger 13 - See below.
Rogue 23
Warlock 22 Wizard 20 - Seriously, even all the UA archetypes are great. All 3 of them. What's a War Mage?
List of things a ranger can do that others can't...
Cast Hex
Have a familiar
Use bows (No one else is proficient in those, right?)
Anything nature-y that could otherwise be solved with a simple skill check (and may still require one)
Use bows... magically, like some kind of Archer that uses Arcane power
Hide kinda okay (but not so well as to double your prof mod to the check, that would be crazy)
The Revised Ranger and the Conclave of the Monster Slayer are okay, but even if I mention it I'm not sure UA counts in this discussion.