One Michigan-based band that I never was able to see in their heyday was Grand Funk RR. They were very popular in my HS days, but of course I could not afford to attend all or even most of the live concerts by great bands whose heydays were also during the late 60s-early 70s. But fortunately they briefly reformed during the late 90s, and I finally got to see them, with the original members, including Mark Farner. It was a flash-back to my HS years, with tie-dye t-shirts, forehead scarfs, beaded necklaces, pachouli oil, MALE-brand button-fly bell-bottom blue jeans, and platform shoes, dingo or fringed boots, and fringed suede jackets...heh!!
Some other bands from that era, that I was able to eventually see much later in their "sunset" years, were Santana, Black Sabbath, Page and Plant (Led Zeppelin), and Alice Cooper (minus his original band-members who were cast-off when "Alice Cooper" went solo, and they reformed/renamed themselves "Billion-Dollar Babies") IIRC....
Other groups that I have never seen that I wish I could have during their prime, for example, were Traffic, America, Cream, Jefferson Airplane, The Beatles, The Kinks, Small Faces, Rod Stewart (before he went mellow/disco), T-Rex, Humble Pie, Sly & The Family Stone, Frank Zappa & the Mothers Of Invention, David Bowie, The Allman Brothers, AC/DC
w/Bon Scott, Early Metallica, (pre-"Black Album" ) Edgar Winter, Johnny Winter, Jimi Hendrix w/ The Experience, The Doors, and pre-80s Led Zeppelin, Rolling Stones, Chicago (Transit Authority) and The Who, The Guess Who, later The Tubes, The Talking Heads, The Clash, Alice In Chains, and Janes Addiction.. .. But I have seen quite a few groups, singers and bands over the years, and at least there are a lot of boots and recordings available, many that I already have, as downloads and DVDs to see them in their prime.