I believe TES is the more consistent, carefully crafted, more polished, complete album definitely....
But best? MMLP takes the cake for me. MMLP was Em at his hungriest. Once he got a taste of that fame on SSLP, he was hungrier than ever before. MMLP goes fully against being "politically correct", and it was him speaking his mind. This album was Slim not afraid to say what he wanted to say. The album is blunt, edgy, passionate and Em's hungriest effort to date. Hungry is the only real word I can think to describe Em on this album.
MMLP = Em at his best