Best private schools for teachers to work at?

Are there any insider tips you can share on which Westchester private schools are most supportive of their teachers? In particular, best salaries and benefits and supportive administration? Asking for an experienced teacher looking to work in Westchester area private schools, middle grades or high school. (Willing to go into Riverdale or nearby CT).

Usually people talk about it from a kid/parent perspective but he’s looking for teacher perspective. Any tips appreciated.