Here's my shot at guessing the top 50:
1. Steph Curry
2. Lebron James
3. Russell Westbrook
4. Kawhi Leonard
5. Kevin Durant
6. James Harden
7. Paul George
8. Anthony Davis
9. Chris Paul
10. Damian Lillard
11. Demarcus Cousins
12. Draymond Green
13. Blake Griffin
14. Jimmy Butler
15. Deandre Jordan
16. Kyrie Irving
17. Andre Drunmond
18. Isaiah Thomas
19. Giannis Antetokounmpo
20. John Wall
21. Karl Towns
22. Paul Millsap
23. Al Horford
24. Lamarcus Aldridge
25. Gordon Hayward
26. Kyle Lowry
27. Kemba Walker
28. Rudy Gobert
29. Mike Conley
30. Marc Gasol
31. CJ McCollum
32. Hassan Whiteside
33. Klay Thompson
34. Demar Derozan
35. Carmelo Anthony
36. Dwayne Wade
37. Serge Ibaka
38. Jrue Holiday
39. Kentavious Caldwell-Pope
40. Tyreke Evans
41. Danilo Galinari
42. Pau Gasol
43. Gorgui Dieng
44. Otto Porter
45. Tony Parker
46. Dennis Schroeder
47. Rajon Rondo
48. Andre Iguodala
49. Harrison Barnes
50. Rudy Gay
Rudy Gay was #80. Personally, I think you're missing Brook Lopez, Khris Middleton, and Derrick Favors. Also I know everyone's down on guys like Love and Dwight Howard, but surely they're still top 100 players, and since they're not 100-51... Does Bosh get ranked? Making room for everyone but Bosh, I have to drop some guys on your list.
No way on Gorgui Dieng or Otto Porter, ditto for Kentavious Caldwell-Pope as no way he could be ranked ahead of Reggie Jackson (#54), but not sure who else I drop. Rondo's probably next off the list.
I'd say LeBron still comes in at #1. TP for taking a stab at it.