You probably don't need that many recurring creatures since your commander is a tutor. Razaketh can eat just about anything to tutor for your recurring creature, then cast it and tutor for a recursion tool like XHD if you need to get back whatever he ate first. I'd run two at most, personally.
If I only had to choose two: Reassembling Skeleton and Brood of Cockroaches. One you can activate at instant speed to return to the battlefield, the other returns to your hand for free without any other restrictions (other than the life loss).
I'm just planning on running the demon in a Ghoulcaller Gisa deck rather than as the commander, but, he's extremely strong. Even if you don't run her as your general, her in the 99 would be decent too since she can make a lot of sacrifice fodder as well as just being a potent token maker that can win games with the sheer amount she can make.
Also, if you're going with the discard route to disable opponents while you topdeck/sac for tutors to work past that, Geth's Grimoire, Waste Not, and probably Liliana, Heretical Healer are all cards worth considering. Myojin of Night's Reach is also a potent discard creature. You can afford the mana cost with all the ramp/rocks you should be running to cast your commander.
Speaking of ramp/rocks: Bubbling Muck. It's amazing, and almost as good as High Tide (not an instant, doesn't provide U).
If I only had to choose two: Reassembling Skeleton and Brood of Cockroaches. One you can activate at instant speed to return to the battlefield, the other returns to your hand for free without any other restrictions (other than the life loss).
I'm just planning on running the demon in a Ghoulcaller Gisa deck rather than as the commander, but, he's extremely strong. Even if you don't run her as your general, her in the 99 would be decent too since she can make a lot of sacrifice fodder as well as just being a potent token maker that can win games with the sheer amount she can make.
Also, if you're going with the discard route to disable opponents while you topdeck/sac for tutors to work past that, Geth's Grimoire, Waste Not, and probably Liliana, Heretical Healer are all cards worth considering. Myojin of Night's Reach is also a potent discard creature. You can afford the mana cost with all the ramp/rocks you should be running to cast your commander.
Speaking of ramp/rocks: Bubbling Muck. It's amazing, and almost as good as High Tide (not an instant, doesn't provide U).
Beating Face with Bane
Beatrice, the Golden Witch