Hi
I think LH could be good. Double miles in C/D and triple miles in First plus 50% Bonus in C/D and 75% in First (25% in Economy).
And the status is valid for 2 years... After 50000 status miles you receive a voucher for a European upgrade. Twoo of them can be used for an intercontinental upgrade.
I have both UA Premier Executive and LH Senator. I use the United card only when I fly UA economy for the 100% bonus miles.
Herve