Straight up ska (in addition to what other people have said): Streetlight Manifesto, Mad Caddies, The Interupters, Big D and the Kids Table, The Specials.

If you wanna go old school and to a couple of biggest influences on modern ska and way more punk: Choking Victim (later morphed into Leftover Crack) and Operation Ivy (morphed into Rancid).

Roots (like ska but a bit more chill): Stick Figure, The Expendables, Rebelution, Pacific Dub.

You may also like Sublime and the band made after that Sublime with Rome (although personally I don’t).

Also something not quite ska but kinda in the vein of, shameless plug for a great New Zealand band called Fly My Pretties.

Mighty Mighty Bosstones and Reel Big Fish are both classics. Im also a big fan of Madness. For Ska-Punk you cant beat Less Than Jake

https://whatdoyouknowaboutskapunk.bandcamp.com/album/what-do-you-know-about-ska-punk-vol-1

Thanks all. I’ll check out all of these. I’m a big Less than Jake fan.

Suburban Legends