A Paladin can be described as a glorified holy knight, and fortunately, there are many armor sets that fit this description ...

The golden color is obvious due to their affinity with the light, and the silver fits due to the Knights ... of a Holy Paladin, as transmog sets of the spec usually identify with such armor.

Paladins have been part of World of Warcraft since launch, and these are the best transmog sets for this iconic class.