Oh, if you'd wanted me to lie to you, Oli, why didn't you say?
In fact, the criteria has completely scuppered what I probably would have listed.....debut LPs by Hawkwind, Gong, Can's 'Soundtracks', Trader Horne's debut (all from 1970), amongst others.
Anyway, completely avoiding Corporate Rock like the plague (no wonder punk happened)....
1. McCartney - Paul
2. Let It Be - The Beatles
3. A Beard of Stars - Tyrannosaurus Rex (1970)
4. Cry of Love - Jimi Hendrix
5. Rosemary Lane - Bert Jansch (1971)
6. The Madcap Laughs - Syd Barrett (1970)
7. Barrett - Syd Barrett (1970)
8. Performance soundtrack (got Jagger on it)
9. Obscured by Clouds - The Floyd (not as good as More but still a great film)
10. Curtis - Curtis Mayfield (1970)
And one for luck, 11. What's Going On - Marvin Gaye
If you want to too, Oli, I'll work on a list of M.O.R. / jaw-droppingly obvious choices just for you!
Now, I think I'll leave the land of the bland and dig out a Gene Vincent LP.