I wear black more than any other color for business dress and my favorites are:
1. Plain toe (e.g., JL Becketts)
2. Captoe (e.g., JL Philip II)
3. Single and double monks (e.g., JL Vale and William II)
I won't wear a black blucher for business wear (though I used to do so). To me, a blucher should be a casual shoe in a shade of brown or cordovan, not black.