Alex, I honestly can't agree with myself on what Miles group was best, so best all time is impossible, but what I really like about Miles' "Second Great Quintet" is how they not only play solos that carry over ideas from the previous solo, but they basically finished each other's sentences. They play fragments of an idea that another player picks up and finished. This fragmentation gives it a little uneven sound, until you start following it. Once I heard it, I thought, It doesn't get any better than this.
Interestingly, Bill Evans trios have great interplay between each member. It's not just Bill's playing. They mesh seamlessly. Different ways to get the same effect.