Cid Highwind because he is actually reincarnated Martin Bromely who came to lead Sega back to it's glory days once again.
For those who have no idea what i am talking about,read this Sega - Wikipedia, the free encyclopedia
The attempts of Player-X and Industrian in Open Discussion shows to me they are members with an amount of sanity to be valued, but there's one nominee who in addition to that, has never given anyone a reason to be unfriendly as far as I could tell. I vote Cid. Actually, there are two (Proto), but Cid has been more active.