That's a hard one. Freeway has some ridiculous patterns. Jay-Z's are unheralded, but they're there (even on, say, "Sunshine", one of his worst singles). Cats who you think have fallen off or are on some basic shit will come back and surprise you with some bananas shit (Rakim on that shit with Alicia Keys and Nas).
Beanie Sigel is a rapper who uses the same scheme over and over again effectively.