If those are the only choices, Lucky Man would get the nod here - only concern for me is him being a spotting gene carrier - but I'm still considering using him at some point for ribeye & tenderness - but I've got to get a few more generations away from the spotted bulls I used in the past.
Conservative's -3 MCE takes him off my list right out of the box, as I'm always breeding with an eye toward what a bull's daughters will do, while making sure their steer counterparts are not throw-aways. Unless I'm breeding terminal calves with no intention of keeping replacements, I'm not using anything will MCE below breed average.
Sure Bet has worked well here on heifers - I've only gotten daughters from him - and he will downsize frame score, if that's a concern. His MCE dropped from >10 to 3.4 after we used him, so he's off the table for the time being, but there's still a LOT that I like about him.
Would use Beef Maker in a second, if my farm manager would let me use a red Simmental bull again.