First Lady that comes to mind is Sweet Alice. She has perfected the very meaning of long and slow.
Quite often, I’ve gotten concerned if I wasn’t feeling it was leading to a climax, and after about 10 minutes I would normally move on to something else, but she really thrives on it. It kinda always sneaks up on me.
In one session, she delivered 3 such long slow ones to me within the hour, absolute bliss.