Night elves do have paladins thoe they call them Huntress class. Paladins are warriors of light, and Night elves have thier own beliefs. They see Elune as THE godess and do not seek further. Taurens accept Elune but only as one part of Earthmother. (jing-jang, night-day). Here is where there Sunwalkers come from. They do not believe in same light as humans, dwarfs, blood elves but in there own spin off. Essentialy they draw their powers from the sun as druids draw their powers from the moon.. While Night Elves see Elune as supreme and Taurens only see her as one part of the whole.
Proof:
http://blue.mmo-champion.com/t/19820...vl2040-mounts/
http://www.wowwiki.com/Sunwalker
http://www.wowwiki.com/Sentinels
About Huntress, here is what it is said on wowwiki:
Huntresses are the elite cadre of the Sentinel army. Drawing their strength from the moon goddess, Elune, these warrior women ride the feral nightsaber panthers into battle. Huntresses are strong and swift, and merciless to those who would defile the sanctity of Ashenvale Forest. Huntresses also have a close bond with the owls of the forest. These owls relay information and spy for the Sentinel army. These are the mounted warrior version of sentinels.
As I said, like paladins they draw their power from moon godess, the same as night elf priests do.
(if anyone didn't know huntresses are all women the same as priestess in night elf culture, druids on other hand are all men.)