Alright, I know people don't have the time or motivation to do every single year of music that they can. You can do 5 years at a time, 10 years, 50 - whatever, as long as it isn't one or two.
1960s:
John Coltrane - Giant Steps (1960)
Max Roach - We Insist! Max Roach's Freedom Now Suite (1961)...