Student Roster —
1. Aeron Snow (Aeron Stark)
2. Robb Stark
3. Brandon Stark
4. Arya Stark
5. Rickon Stark
6. Jojen Reed
7. Meera Reed
8. Lyanna Mormont
9. Yara Greyjoy
10. Theon Greyjoy
11. Gendry Baratheon
12. Samwell Tarly
13. Willas Tyrell
14. Margaery Tyrell
15. Domeric Bolton
16. Arianna Martell
17. Trystane Martell
18. Shireen Baratheon
19. Myrcella Lannister
20. Daenerys Targaryen
21. Aragorn (Aegon Targaryen)
22. Rhea (Rhaenys Targaryen)
23. Rosalynde (Ros)
24. Grenn
25. Pyper (Pyp)
26. Podrick Payne
27. Ygritte
28. Missandei
29. Thalia Grace - PJO
30. Luke Castellan - PJO
31. Annabeth Chase - PJO
32. Nico Di Angelo - PJO
33. Bianca Di Angelo - PJO
34. Wanda Maximoff - MCU
35. Nina Gurzsky - X-Men Apocalypse
36. Anakin Skywalker - Star Wars
37. Paul Atreides - Dune
38. Jack Frost - Rise of the Guardians
39. Carrie White - Carrie (2013)
40. Kristoff - Frozen
41. Elsa - Frozen
42. Anna - Frozen
43. Rapunzel - Tangled
44. Flynn Rider - Tangled
45. Peeta Mellark - The Hunger Games
46. Enid Sinclair - Wednesday
After 5th year at Hogwarts (and trust me there will be a LOT happening that year), Ben will return to Westeros, build his castle, turn it into a school and build a city around it. Letters will fly across the omniverse to selected pupils.
The above list contains the students I have selected so far. As you can see most of them were good-hearted people who got bad ends and could have used a little guidance, knowledge and help. Ben will give them just that.
Give me your thoughts on them and feel free to suggest other likely candidates, but only from movies, shows and books. I don't have enough time to research anime or games right now.