Lufthansa has at least 20 flights a week from FRA to JFK + 1 daily flight which is operated by Singapore Airliines. 2 x B747-200, 1 x A340-300 (1 x SQ 747-400)
The MUC-EWR flights will be switched from A340-200 to A340-300 from October.
LH flights from Germany NYC:
3 daily Germany-JFK (FRA, FRA, FRA) + 1 SIA (FRA)
3 daily Germany EWR (FRA, MUC, DUS)