| This is a poor quiz, WWE officially recognise Grand Slam Champions as a winner of 1 or more of the following tier, therefore Punk, Rey and Big Show don't count.
Top tier - WWE or World Heavyweight Championship
Second tier - Intercontinental Championship (US may become an alternative, but no one has become a Grand Slam Champion by winning that yet, so that remains to be seen)
Third tier - European and Hardcore (These are now defunct, whether another belt becomes an alternative will remain to be seen.)
Tag team tier - WWE Tag Team Championship, World Tag Team Championship or Unified Tag Team Championship
Also worth noting is that there are currently five competitors who can currently win the Grand Slam.
Big Show - Intercontinental title
Christian - WWE or World Heavyweight title
Goldust - WWE or World Heavyweight title
The Undertaker - Intercontinental title
William Regal - WWE or World Heavyweight title |