Agree with several others here that the Oberwerk 5000 tripod and head will give you some flexibility (provided your neck has some flexibility as well!). I've had mine for about a year. It works well and is moderately priced. How comfortable a tall tripod is to use varies with the elevation and the individual.
Two nights ago I was using it with my 10x42s and 15x70s for comet searching in Leo, which was nearly overhead. It definitely was not very comfortable and views were short, but earlier in the evening I was panning around Orion and Canis Major at moderate angles with no problem or discomfort. Angled binos are very nice, but it's also nice to be able to look directly at your target.
A zero-gravity chair is the ticket for casual, high-elevation-angle viewing, for lower powers at least.