In fact, I just got a tiger goby (my LFS called it a bullet goby) last week for this very purpose. Right now, he is mainly concentrating on one corner of the tank -- mostly, I think, because my maroon clown and yellow tang won't let him really explore the rest of the tank yet.
Do you have only one tiger goby, or more than one? My LFS suggested that in larger tanks you can have more than one, but I don't want to get more than my system can handle. I think in the 58, one will be enough -- he just has to get brave enough to do the whole tank.