Yes he is in my top 5. I rank him number 1.
1999-2002 was of course his best days. What rapper would have touched Eminem in his prime? Sing For The Moment, Lose Yourself, Rock Bottom, Way I Am, Stan, Criminal.. I mean the list of classic tracks he made within that time period just goes on and on.
It's thrown around a lot, but SSLP, MMLP and TES. All three are really considered classics - why would you not put a rapper who has three classic albums, all producing various hip-hop classic tracks within your top 5?