What are some NES and SNES games I must have?

[First Names First]

I'm buying a NES, and I'm upping my SNES library.

I already own the following SNES games:

Mega Man X.
Super Mario World.
Super Mario All-Stars.
Ultimate Mortal Kombat 3.
Madden NFL '95.
The Lion King.
Primal Rage.