what about Alireza Dabir?
I don't know about best ever.... but I sure do like Dabir as one of the head inside contenders. I also like S Belaglosov and his snatch single as a contender.
Smith...... I look at him as more of a technical finisher. He'd just throw technique out there.... HC, LS, duck, and so on, and just work the position until he won..... versus get it and finish. If I were to rank his go to moves it would be his HC, and whizzer counter.... at the higher levels.