The MC get transmigrated into a novel: https://www.novelupdates.com/viewlist/43681/ the MC gets transmigrated into a game world: https://www.novelupdates.com/viewlist/43504/ The MC transmigrated/reincarnated into a cannon fodder character or a villain: https://www.novelupdates.com/viewlist/32887/ The MC get transmigrated/reincarnated but not has a villain or cannon fodder: https://www.novelupdates.com/viewlist/43697/
oh perfect, I can send it to you here. Quickly Wear the Face of the Devil (world hopping) Rebirth of a Supermodel My Husband is Suffering from a Terminal Illness Transmigrated into the Film Emperor’s Death-Seeking Finance The People Who’re Supposed To Kill Me Fell For Me Instead (world hopping) The Villain Is Too Cute (world hopping, on-going translations) Transmigrating into the Reborn Male Lead’s Ex-Boyfriend Transmigrated Into a Big Boss to Snatch Away the Cannon Fodder Who Touched My Tail! (world hopping) Holding Onto My Man (world hopping) I have more but I'll have to look for them to remember their titles. edit: also lmk if you're not looking for any world hopping, I can go on a deep dive to look for the non-world hopping ones I've read
all of these are ongoing translations jsyk bursting after he transmigrated into the cannon fodder omega genius protagonist from the future where mechas exist, had a sickly body but transmigrates into a book with slightly inferior technology. he finally gets to work with mechas instead of just on them (ie., he finally has a body that is able to handle being in a mecha rather than just designing them) and joins the school team while face slapping a bunch of characters because the original "owner" of the body used the back door to get into the mecha academy married the scum gong's villain brother another genius protagonist with a sickly body who transmigrates into the body of a university student. basically no one is smarter than him and he is able to help out ml's technology company, though that comes a little later in the novel. his op-ness is more lowkey than the above novel reborn as the villain presidents cat and dog mc dies and is able to "read the book" where he is a cannon fodder character who only exists to die, triggering a chain of events so that the main couple of the book is able to get together. in the process, his neighbour gege (ml) also dies trying to avenge him. mc is reborn to his first year of university and decides to make amends with his ge so that to some level he can control and avoid the series of events that leads to him dying. however, at 9pm everyday he turns into either a cat or a dog for 12 hours and is also able to communicate with them in his human form. its also worth noting that mc was pretty op even before he died; he is unreasonably smart, rich and handsome.