"You can make a light tonearm work with any cartridge just by adding weight until you get the right resonance frequency."
Making it "work" and making it sound good are not the same thing.
"I don’t want to let it slide that the Rega RP10 (and surely it’s successor) is a Stereophile A component, and reviews for it are extremely positive."
That does not mean it will sound great, or will work well with any of the cartridges you have in mind. It will sound fine and function well with a Rega cartridge.
Making it "work" and making it sound good are not the same thing.
"I don’t want to let it slide that the Rega RP10 (and surely it’s successor) is a Stereophile A component, and reviews for it are extremely positive."
That does not mean it will sound great, or will work well with any of the cartridges you have in mind. It will sound fine and function well with a Rega cartridge.