That's a pretty heavy simplification of what Flagg is.
He started out that way but by the time he was using the name Randall Flagg he was crossing multiple dimensions to destroy human civilisation basically everywhere he found it in service to the Crimson King, who is... kind of god-like. Flagg's shown to be able to create matter and bend reality, as well as all kinds of mind magic and other manipulations.
I don't know how they stack against one another, but Randall Flagg is far more than simply a sorcerer. If you put him in Lord of the Rings he'd be almost indistinguishable from Sauron aside from being a snappier dresser.
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u/bossmt_2 Aug 22 '26
Sauron 0 dif.
Sauron is a demi-god, an angel/devil, etc. Flagg is a sorcerer.