Joseph: Haven’t you called the Tzitz Eliezer MO in the past?
But yeah, there are a few that you would definitely classify as MO. Bnei Banim, BeMareh HaBazak, Melamed Leho’il, R’ Ezriel Hidesheimer, Sridei Eish, Kol Mevaser, Heichal Yitzchak (R’ Herzog), Yaskil Avdi, and probably more. Those are just off the top of my head.