I thought it seemed like a good time to ask this question. I know of some stories with the Celestials and all their stuff. There's obviously the original Jack Kirby Eternals. I recently read the True Believer reprint and enjoyed it quite a bit. I know there's a Thor story with the Asgardians, Olympians, and Eternals, but I'm drawing a blank on the details. I remember a story in X-Factor called Judgment War that I enjoyed a lot (it sort of played out the same Celestial themes on a different planet).
Any other good suggestions?