Working on setting up my bass because my action was too high, now realized that my action has to be high unless I want buzzing on frets 12 and up (on all strings except g?)

Title. Ive adjusted the truss rod because that was originally part of the problem when i first started setting it up earlier, but now I have to have the saddles unreasonably high in order to not get an insane amount of buzzing on the high frets on strings e, a, and d. (They're still buzzing even with the high saddles but not as bad as they were) For some reason the g string seems to be fine though. Is there anything I can do to fix this or would it be better to take it to a professional at this point?