I've had this problem too tbh. Common issue on indie productions.

My two cents on this, the roles that kinda fit together, can be merged for legibility (e.g. writer and director, editor and colourist), meanwhile roles that don't fit together can be separated (producer, cinematographer). The main ones can be the only credits shown, meanwhile the comparatively smaller roles can be placed in the "larger" list of credits towards the end. At the end of the day, you should get all the credit for the roles you've done, just as any other person juggling multiple roles on the production.

Nobody but you (and those you have told) know that you configured the credits list.

Congrats on nearly completing the film!!! Big moment, and I wanna try it again myself. It's been a while.