Richard Madden for Bats
I know he gets compared with Cavil...but think ahead. 6 years, time will change that. Batman is never going to share a film with Superman at this rate, so Madden and Cavil are never going to be together onscreen which won't be weird. Bruce and Clark look like each other in the comics anyway.
So bottom line...it doesn't matter if they lookalike or not.
Madden is a gifted and growing actor and it would be great to see him considered for Batman.