Takeda Hiromitsu is the king of NTR.
Arakure is also great and Minamotos wife NTR 3 part doujin was amazing. Oh and Etuzan Jakusui is a god when it comes to mixing NTR and Milfs, even though he does like 50/50 vanilla and NTR, most of his work is cheating not real hard NTR.