I don't think they should go with another white male captain
Unless it's Ben Browder.
Angela Bassett is also a good choice.
Hey, here's a compromise. We could have a Medusan captain, during a time when Medusans have perfected humanoid exoskeletons in order to fit in with other Federation species. The Medusan could be played by Ben Browder as the exoskeleton, without the character being white, male or even humanoid.
Or the exoskeleton could be played by Angela Bassett, of course.