Great recordings with great harmonies from 1960s

Speaking of music from the 1960’s, anyone checked out Tick Tock radio?   THey have a station for popular music each year since 1950, including a lot of "deep cuts", at least from a US perspective.  Very interesting to hear a) what was popular during a particular time and b) how popular music evolved over time to what it is now.

Sound quality is MP3 level, not CD res, but decent for the content provided and quite listenable.  Much better than what most people heard when listening to these tunes on the radio, so a step forward from that actually.  Available via Roon among others.

Note:  Indication is Tick Tock is located in China. You would never know by listening.  They provide a unique musical service for the world including  US music fans.  Why can’t we do that?

Too many "great harmonies" to even attempt to address here.  "Those were the days my friend..."

classic hollies were produced by a george martin understudy named ron richards and sounded great.

early byrds would be my other pick--esp. their s/t debut and turn turn turn. if nothing else, david corsby was a vg harmony singer.

The 4 seasons next to the Beachboys.

@loomisjohnson beat me to The Byrds, but there's always The Everly Brothers (they broke big in the 50's, but also made great music in the 60's and beyond too), The Band (their first two albums came out in 1968 and '69), The Mamas & The Papas, Buffalo Springfield, Moby Grape, The Righteous Brothers, The Temptations, The Four Tops, The Drifters, The Platters, Dion & The Belmonts, and a little combo from Liverpool.