49 known values for icon with current usage counts:

1. default (25214× used)
2. angel_wings (7666× used)
3. crown (5846× used)
4. joystick (5829× used)
5. moon (3766× used)
6. sakura (1987× used)
7. cat (1726× used)
8. dog (1544× used)
9. spider (1191× used)
10. pumpkin (703× used)
11. vampire (603× used)
12. headphones (535× used)
13. sunglasses (513× used)
14. target (501× used)
15. moustache (367× used)
16. coffee (306× used)
17. skill_issue (208× used)
18. panda (203× used)
19. snowflake (165× used)
20. santa (110× used)
21. wizard (74× used)
22. pirate_flag (72× used)
23. king (66× used)
24. octopus (64× used)
25. reindeer (61× used)
26. bad_bunny (53× used)
27. rocket (50× used)
28. yeti (49× used)
29. lunar_dragon (40× used)
30. wanted (38× used)
31. koala (32× used)
32. ghost (29× used)
33. planet (26× used)
34. pirate (23× used)
35. pyramid_eye (21× used)
36. shark_attack (20× used)
37. bread (18× used)
38. robot (16× used)
39. cute_bunny (14× used)
40. fossil (14× used)
41. cactus (13× used)
42. mountains (11× used)
43. watermelon (10× used)
44. eliminated (7× used)
45. clover (5× used)
46. build_off (3× used)
47. bingo (3× used)
48. shooting_star (2× used)
49. eleven (1× used)