Well, counting Esme's Waifus we have, in no particular order,
Anna, Varity, Tessa, Filigree, Pain Strider, Rowden, Banshee, Caramel, Galatea, Carol, Coral, Sonja, Elizabeth, Evangela, Fortran, Chloe, and Florencia.
Not sure if Galatea should be up there, she's more of a matronly figure then anything else, or if Florencia counts, possibly she's so TsunTsun for Delessa that she's looped round the side and come back as Dere?
All in all that's a grand total of 17 waifus
With Esme claiming 4: Tessa, Anna, Varity, and possibly Galatea
and Inquisitor Kravos claiming a grand total of fifteen, sharing Anna and Varity between the two