Radagast

Radagast, also known as Radagast the Brown, is a wizard who is in the same gang as Gandalf and Saruman. He is a bird-lover by nature, and helps poor little animals who get hurt. What a nice guy!

Don't underestimate his power though, otherwise you'll end up as a newt or something. He isn't as bumbling as he looks, he was able to steal the sword of the Witch-King. He also apparently owns a TARDIS, although that might be someone else who looked like him at one point.