I'd call the badge "Spirit". The spirit of the site is to get all good content up to the top where it can be as useful as possible.
If you consistently up vote based on merit alone, even if it means another answer scores higher than your own, then you have the spirit of the site at heart.
And yes, I think that does deserve a gold badge. By the time someone reached ~400 - 500 votes, it means we're just rewarding someone again for consistent, desirable behavior. That's precisely what badges should be doing.