Dont forget can tah from desperation

Honestly, I don't think Carrie belongs in that list. Plus, Randall Flagg is a more prominent Antagonist across more books

Yrah but these are from horror films.

I suppose, but Flagg has appeared in the two The Stand miniseries, both of which are horror.

He has also appeared in thriller movie Hearts in Atlantis, the last episode in 11.22.63(Also Thriller) during the president's assassination. Flagg is also speculated to be IT/Pennywise.

Cool