Virgin is looking the best value at the moment if you just want the insurance.
Santander includes family insurance and phone cover (both extra on Monzo Max). They also use Likewize rather than Assurant for phone cover (who get better reviews).
Nationwide use AA rather than RAC which some see as an advantage.
Co-op seem competitive but you have to deal with the most legacy of legacy banks.
(I’ve moved to Santander but have previously had Nationwide FlexPlus and had no complaints.)