Great points Dakota,... I too often wondered if an all Vulcan ship would, pardon the pun, LOGICALLY have a Vulcan captain,... and yet,... we learn in 'Amok Time'
, that Spock is the most famous Vulcan in Starfleet,...
Now, that would make one think that IF a Vulcan were a Starship captain, he would be more exhaulted than Mr. Spock,... so if you follow that, and take into account the above, then we are back to Krasnovsky and Chandra,...?
Also I recall what you mean about there being a list in STONE'S office,.. but to have 3 of 12 Starships at one Starbase at the same time is a bit of a stretch, when you consider the size of the galaxy the FED patrols, let alone considering even more Starships and more Captains running about this same Starbase at the same time,... must have been a one hell of an Ion Storm out there!!!! LOL!
Puzzling, you see! LOL!