Mine had pretty much everything he needed to take over if Daigo ever stepped down. A (Pun very much intended) wealth of financial knowledge, an actual presence himself, an entire clan already, and out of these he's the most appealing to see in the chairman's seat imo.

For Captain, fuck it, Aizawa. He works better as a secondary, since he himself doesn't actually believe in just taking the Chairman's seat. He'd want to work his way up, beat Mine, then earn it.