Choosing not to really does cut away a great deal of Content after all the game is called "Ravager" but the routes I can think of where rape can be avoided in favour of consent are:
Mina, Cuchilla, Chanwe (technically rape but she is rather eager), Darja, Marie, Issa, Eburon, Mother, Malice (requires you to rape Heloise) and Naho (when in heat)
rape necessary for sexual content:
Naho, Heloise ( a lot of content is locked behind this), Valzira, Catgirl Sisters, Maelys, Handmaid, Demon and enid.