You are literally wrong in everything you wrote.
The only races canonically that are paladins are humans and the originam dwarf race. Every other one is lorewise not a paladin but a seperate class.
Tauren sunwalkers are not "paladins" in lore.
This was also confirmed by devs stating the new races are not actual paladins, they just use the paladin model so that each time they do nor need to make a new spec.
Blood knights canonically are not paladins
Sunwalkers canonicly are not paladins
Prelates canonically are not paladins