The total number of  cards is not known but is probably between one and two hundred.  Ron Weasley has over 500 cards and has 6 copies of one card, and is still missing Agrippa.

 Agrippa
 Albus Dumbledore - CURRENTLY HEADMASTER OF HOGWARTS - Considered by many the greatest wizard of modern times, Dumbledore is particularly famous for his defeat of the dark wizard Grindelwald in 1945, for the discovery of the twelve uses of dragon’s blood, and his work on alchemy with his partner, Nicolas Flamel. Professor Dumbledore enjoys chamber music and tenpin bowling.
 Ptolemy
 Morgana
 Hengist of Woodcroft
 Alberic Grunnion
 Circe
 Paracelsus
 Merlin
 Cliodna – Druidess

The following are not specifically named, but odds are very high that these individuals also have cards:
Newt Scamander - Author of Fantastic Beasts & Where to Find Them
Godric Gryffindor
Helga Hufflepuff
Rowena Ravenclaw
Salazar Slytherin
Cornelius Fudge
Nicolas Flamel
Emetic the Evil
Uric the Oddball
Grindelwald
Elfric the Eager