LH's Privatair
ORD-DUS (and return) 737LR, all Business Class - this was with LH (but they also now have it with Swiss and KLM).
I've never experienced in my entire life being thrown around in the middle of the Atlantic as I did with this small airplane. However, 1st class service. On the way there it was PACKED, on the return there were ten of us (out of forty seats).
UG