Stephen King book “series” (Dark Tower, Castle Rock, Holly, etc.)

I am almost done the Holly Gibney books and want to move onto the Castle Rock stories next, followed by the extended Dark Tower universe books. Then whatever is left over.

Am I missing any other series to group the remaining books into that aren’t included in these 3 series? Even just a common theme running through a good chunk of them would be helpful. My goal is to read them all eventually, but I’m a nerd and had to make a spreadsheet to plan out my reading journey.

For context the books I’ve read so far are Under the Dome, 11/22/63, The Institute, The Gunslinger (this was difficult to finish even though it’s the shortest), the Bill Hodges Trilogy, and The Outsider.

So outside the 3 series mentioned, how would you group the remaining books? Sci-fi, crime, straight horror? Bonus points for a good reading order as well, otherwise I’ll stick to publish order!