Wolves have tons of mythology from northern europe. Seems as though all of Europe was insanely afraid of them. Plus they can be tied into the creation story of Rome, etc. =P
Well cats have alot behind them. From Egyptian belief, they are the keepers of the underworld and from American folk lore, they are symbolic with witchcraft and negative conotations. I dont think that helps though.
Other animals you can look at that have meanings behind them (i dont know specifics) but the Ox, Deer, Buffalo and Tiger all have been used.
I would recommend Wolves, wolves rock! Think of the name Adolf, it's german - the combination of Adel and Ulf, which is Noble and Wolf. That's the way to go, and wolven paladins are probably not overdone. Although wolves+warriors is done all the time. Also, bears are cool. But more connected to strength and power.
"That surface that tells the Heavens it hath an end, cannot persuade me I have any."