In my day, we called them "all day rockers," the LP's with one side devoted to one song. I loved them. Still do,
Some that come to mind are:
In-a-Gadda-Da-Vida - Iron Butterfly (considered THE grandpa of long LPS.)
Do You Feel Like We Do?-- Peter Frampton
Free Bird -- Lynnyrd Skynnyrd, from album/ live / One More from The Road
Voodoo Chile-- Live studio work with friends/ Electric Ladyland LP
Tobacco Road (live) by Johnny and Edgar Winter from LP, Road Work
Thanks for asking this question. Made me feel alive. Again.