Lisa Bella Donna is an American expert in the use of the Moog Synthesizer. On youtube she is showing them off in great style. Not since Klaus Schulze has anyone been as proficient in the instrument in all its variations.
The best introduction to her work would be Destinations:
It also helps that it has the best album design of her catalogue. All her work can be found on bandcamp.
But for the tour de force, see Mothership II on youtube