Let me explain a bit of my thought process.
Firstly, a lot of the work is indeed stuff people never see. But like arsy said, most importantly is the link the community needs with the Mod team. We need direction, else we're all loke headless chooks, with ppl dropping off and numbers dwindling. There have been a few mods in the past (eg, Nolio) who were really in touch with the player base. That is sorely needed.
Now, let me explain my choices...
Primo - Retain. Regardless of what ppl say, for now he does have a 'senior' type role. No existing mod can fulfil this role, and Primo does do a good job.
Thirdrock - TR is smart and could potentially be groomed to take on a bit more of a senior role. He puts in some balance. Granted he was inactive for a bit, but he's back now.
Mizzle - He does a lot of background work and is generally liked by the community. Mods need to be like this.
^ Thats for the existing.
Whiteshadow - Great game knowledge. Mods NEED to have this to help bring in things they think would be right.
Hardcore4eva - Usually is quite an ass, but more often than not, he's just being frank. At this time not many know more about the game, and more impotantly, he does bring in good ideas that can help the direction of IC. This too, is sorely needed.
AA - AA can be very eccentric. He's really passionate about the game and passionate to keep it going. He has radical ideas. Some good, some not so good. the not so good ones will be filtered through by my other suggestions, cos they know the game well. Either way, AA is the type of person who incites the motivation to change. This is key and also needed.
Broker - One of the quiet ones if you don't know him. But again, this guys game knowledge is awesome. he knows how the game works.
Genesis - should have been modded a while back. Knows hell of a lot abt the game and is very sociable too. Ppl need him to be in touch with wha the community wants.
Basically a mix of ppl there, but together they eliminate any individual flaws and could complement each other well.
There could be others that would work better too, but right now you don't need half the players as mods 
Imo, there hasnt been a better time to mod. Why? Because ppl want change and you have the right to try to bring it. Mix this in with having Ps, who definitely can bring the changes(eg sd market awesome!). Ofcourse any change needs tweaks, but the fact he can do em, is brilliant for ic.
Exciting times ahead!
....so long as you get the right ppl helping.