One of my all-time favorite singers, Bobby "Blue" Bland, and a 1974 live performance from the Midnight Special. It seems that there is no surviving video footage of him from his sixties heydey (please prove me wrong!), so this is probably as close as you can get.
He visited Finland only once, in 1994, and I'm happy to report that I was there and he was still great!
Bobby "Blue" Bland: "Goin' Down Slow" (1974)
https://www.youtube.com/watch?v=9yuqW64vias
Another video from the Midnight Special TV show - the always wonderful Gladys Knight & the Pips and "Neither One Of Us", one of their last Motown hits, before they moved to even greater success at Buddah.
Gladys Knight & the Pips: "Neither One Of Us (Wants To Be The First To Say Goodbye)" (1973)
https://www.youtube.com/watch?v=pVWvoPq1eN8
More Charlie Rich from the Midnight Special. This is an excellent live version of his first hit, "Lonely Weekends", which originally came out on Phillips International (a subsidiary of Sun Records) in 1960.
Charlie Rich: "Lonely Weekends" (1974)
https://www.youtube.com/watch?v=09LG9cQuOrg