Buffalo Springfield was formed in Los Angeles in the mid 1960s by Canadian and U.S. musicians, including Neil Young and Stephen Stills, who later helped form Crosby, Stills,Nash & Young. They had a few big hits, but this is my personal favorite. Here's Mr Soul:
https://youtu.be/jyc0JSd5q7U?si=6Pu3QTszYYfuSZWg