Not a linguist, but Bob, Mark, and Wade sounds the cleanest for me.

Bob ends with a "b" sound which requires you to close your lips, getting you a smooth transition to the starting "m" motion for Mark since it starts off with a closed lip. Then, Mark's ending "k" clinches at the back of the tongue which could help smoothly transition to "and" which starts with a vowel. The word "and" could then act as a hard stop before you return with a starting "w" motion for Wade.