There aren't many "hard dom" relationship choices for the PC to do to others like eubicha and low-con etheryn.
OR the PC being a "hard dom" in the relationship like the way the following charaters are with the PC; eve, arona, that futa human lady in the elf woods, futa dyrad, new centaur, the hornet (dragon version), that boat orc, that random horse shemale(?) that like elves, shark futa lady.
There are many submissive fem npcs but they aren't many npcs where they are your fuck toy/bitch/personal slut/squeeze toy/etc