Peter Fairbrother wrote:

I don't know of any other liquid oxidisers in use that Henry hasn't
mentioned, save fluorine/ flox, which is ridiculously dangerous and
unfriendly.

There are some exotics, like perchloryl fluoride and nitrogen trifluoride,
but I don't believe they are in use. Chlorine pentafluoride has been
used in upper stages/buses, but it's extremely dangerous.

Paul