A personal favorite of mine is 'What I Say (Live)' off of 'Live Evil. That bass line is the foundation for a lot of my own playing and Keith Jarrett is on FIRE in this performance. It's a shame that his Miles performances are the only ones where we got to hear him in this idiom.
I'm also a huge fan of 'In a Silent Way' and 'On the Corner'. I suppose my fav Mile's records are the ones where he was really pushing the boundaries of music. It reminds me of the tag that started appearing on his record around the era of 'In a Silent Way': "Directions in music by Miles Davis."
Edit: Wow. The reviewer really just skipped right over these two records. I guess they're probably niche for most people. That's too bad, cause they're the most bombastic records in his catalog and really highlight his range and the depths of his innovations. Oh well.