I just did a bit of a sweep of my parts box and came up with these:
I used to like this sort of bridge as the saddles are locked into grooves, so they won't wobble or tip. I don't play bass with a heavy right hand attack any more, so that isn't really an issue.
I wish there was a smoking gun, 'I swapped out the bridge for one of these and it did X', but I can't place it from my own experiences. I can see an argument for why a higher mass bridge might increase sustain and tone, and I can see the argument for why it might do the opposite.
I did handle a '70s Jazz bass a few years back that had a Badass II and brass nut fitted. The benefits of these, in terms of sustain and tone, were possibly undermined by the wavering gaps down each side of the neck. It was also a right heavy bastard, beaten to death, dirty and finished in a thick clear coat. "Mojo", apparently.