Would Makuta who aren't interested enough in Rahi to become full-time Rahi creators specialize in any particular sort of Rahi, though? Even Chirox and Mutran only specialized in a certain kind of Rahi if you count "ill-tempered-and-far-too-dangerous-to-be-sensible" as one.
I personally believe there are four kinds of Makuta in terms of Rahi creation:
1) Those that really like a very certain kind of Rahi - Miserix and Kojol for example
2) Those that create what they deem interesting at the moment, sometimes simply for the sake of it - Chirox and Mutran for example
3) Those that create only what they need at the moment - I'd put Teridax here
4) Those that aren't interested enough in Rahi creation to bother with it if they don't have to - mostly warriors like Icarax, Antroz and Gorast