Other than Ring Generalship, Chin is probably the most important for me (along with takes punishment). All the stats in the world won’t make a difference for someone with 5 for chin.
But to be honest, as balanced as possible is the key. If you can get all stats in green you have a winner.
However, whilst big stats are important everything is relative and good/appropriate matchmaking can go along way. Each fight is relative between the two fighters and you can go a long way in finding guys one notch below yours.