Can’t believe no-one’s mentioned
Rx Bandits [moved from Ska>Rock>Prog over their course] – Frequently amazing – I’d say The Resignation should be mandatory for all even slightly interested in Ska and Rock. If you can find a copy of Demo(nstration), it’s great fun! NB you need to hear it in CD quality, or higher.
Mad Caddies “Duck and Cover” is one of the most engaging Ska/Punk Hybrid albums and frequently converts those who hear it. I gather they used to be mostly the same band as The Ivy League