Meanwhile most of those British Invasion band are boring and naff. But some of them, like the Zombies, Animals, & Donovan were good.
But what about The Beach Boys (Even Paul McCartney said were better), Roy Orbison (McCartney and Lennon both said they were jealous of him.), Mama's and the Papa's (Much better than PP&M), Lovin' Spoonful, CCR, Doors (The Beatles wish they could be as interesting as them.), Sly & the Family Stone (Way better than the Beatles by 1969.), the Box Tops, Ray Charles, the Impressions.
I could list every band on the Nuggets compilation. They deserved more attention than the British Invasion Groups. I could also list every Motown [They had more #1 hts than any other label.] band if you want. (The Beatles AND the Stones like to cover them.), all the Stax/Volt bands, the Atlantic bands, and then other Soul bands.
Personally, I don't like the Greatful Dead, or Country Joe & the Fish, but some people do, and there are other that people like, like the Byrds, Velvet Underground, Big Brother & the Holding Company, etc.
There's a whole bunch of others I could name, but I don't want to type that much.
I didn’t cherry pick one group. Peter, Paul, and Mary were the darlings of the cause - from regular television appearances, appearances in Washington DC for political causes including covers of the songs by Communist Pete Seeger, protests against nuclear energy, etc.
Denny Doherty of The Mama’s and The Papa’s was part of the Canadian Invasion.