I was hoping for some games with a bit more modular MC, I especially like to play as a futa.
That is fair that is why I made sure to stress that point when replying to you. One thing I do like about CoC 2 and Tits are the options with the character's appearance compared to other games. Futa or modular PCs in corruption fantasy settings are hard to come by and Skandranon is right I can't actually recall anything not text related that can compare to CoC 2 or TiTs in this regard. Most of the best power fantasy or fantasies with corruption inolve almost no MC modification at all such as Renyuu ascenscion and Last sovereign are good power fantasies with some corruption but are RPG maker games which aren't for everyone.
Renyuu ascnescion will have some TF elements in the game as it does have the MC turn into a female for a few short sex scenes also some male party members can be turned into women too. Soon there will be a time skip where all the women the MC got pregnant will have children. However the game is a massive time sink and far too grindy for any replayability I would suggest asking for an up to date save and checking out the gallery first before playing.
There is also another big RPG maker game that does offer a male or female option that was completed in the last few months which had character origin backgrounds like in Dragon age Origin that wasn't bad either.
For the option to play as futa MC in a corruption power fantasy I would suggest playing the old CoC with the most recent mods if you haven't done that already. There are others but they are either in development hell with only a fraction of CoC 2's content or buggy messes with no sense of direction. However none of those games have CoC 2's budget, multiple writers and coders or dedicated fan base the CoC gave TiTs and CoC2. So to compare them isn't totally fair because those factors make a huge difference especially when the fans of CoC, TiTs and CoC 2 have created a lot of free content for the devs over the years.