Is the wait between BSC graphic novels agonizing? Try one of the 213 chapter books from the original series run (1986-2000).
Not a graphic novel but still good!
If you want to do a deep dive into "popular paperbacks of the 80s and 90s," the Sweet Valley Twins were just as popular as the BSC back in the day. (Just ask your mom, cool aunt, and/or local librarian.)
Have you ever struggled with feeling like you don't have a group to belong to? This one's for you.
While the focus is more on friendships (and rivalries) than the clubs, this series has a lot in common with the BSC!