I have to do a BOS>LHR and LRH to ORD trip later in the month. I'm Delta Platinum, flying in F, and prefer to stay Delta. The BOS to LHR is an easy choice, done that a half dozen times last year on DL.

However, I need to fly a redeye back from LHR to ORD, preferably direct, so that I can finish a day of meetings in LHR, then be in ORD the next morning for another meeting. Which means no DL or Skyteam

So, I am at a loss for which TATL provider I should fly. Prefer flatbeds, and want to prioritize ability to sleep over service/food.

Please, Oneworld Alliance folks and others...teach me.

Thanks in advance