My roster maker is a little... spiteful right now so I can't post an image. But here's a text form.
Mario (Super Mario Bros.)
Donkey Kong (Donkey Kong)
Link (The Legend of Zelda)
Samus (Metroid)
Pit (Kid Icarus)
Bowser (Super Mario Bros.)
Peach (Super Mario Bros.)
R.O.B (Gyromite)
Mario, DK, Link, Samus and Pit are big names on the NES, so they're obvious. Metroid and Kid Icarus were, at the time, one game franchises, so I didn't want to include other characters such as Little Mac or Takamaru because they're also one game. Bowser and Peach were, and still are, Nintendo's most prominent villain and female, respectively. R.O.B is an icon of the NES, saving the system.