Warrior - End game raid tank
Pally - Group Tank
I much prefer to have group with a paladin rather than a warrior because they can get threat instantly while warriors need to wait for their weps to proc unless they have a bio orb which most don't at least while leveling to 60.
I also say role paladin for end game raiding, because no one bids on the pally only crap that drops. Seen multiple
https://wiki.project1999.com/Shield_of_the_Dawn just given away to alts and random people just so they wouldn't rot.