#3
I recognised more of them than I can remember the names of, but here's the first 50:

1. ?
2. ?
3. ?
4. Wolfgang Amadeus Mozart
5. Johann Sebastian Bach
6. Ludwig van Beethoven
7. Robert Johnson
8. ?
9. Charlie Patton
10. ?
11. ?
12. ?
13. Duke Ellington
14. ?
15. ?
16. Frank Sinatra
17. ?
18. ?
19. ?
20. ?
21. ?
22. Willie Nixon
23. Muddy Waters
24. Django Reinhardt
25. ?
26. Les Paul + ?
27. Miles Davis
28. ?
29. ?
30. ?
31. ?
32. ?
33. Elvis Presley
34. Chuck Berry
35. ?
36. ?
37. ?
38. ?
39. Ray Charles
40. ?
41. ?
42. Art Blakey
43. Charles Mingus
44. ?
45. Grant Green
46. ?
47. ?
48. ?
49. Herbie Hancock
50. ?
#4
51. ?
52. ?
53. The Beatles
54. ?
55. The Rolling Stones
56. The Who
57. The Yardbirds (Clapton-era)
58. Bob Dylan
59. ?
60. ?
61. ?
62. ?
63. Aretha Franklin
64. ?
65. Buddy Guy
66. Jimi Hendrix
67. ?
68. The Doors
69. Eric Clapton (Cream-era)
70. Jeff Beck
71. Jimmy Page
72. Robert Plant
73. John Bonham
74. John Paul Jones [71:74= Led Zeppelin]
75. Black Sabbath
76. ?
77. ?
78. Crosby, Stills and Nash
79. ?
80. ?
81. ?
82. ?
83. ?
84. ?
85. ?
86. ?
87. ?
88. ?
89. ?
90. Duane Allman
91. Etta James
92. ?
93. B.B. King
94. ?
95. George Benson
96. Elvis Presley
97. ?
98. ?
99. ?
100. ?
101. David Gilmour

cba to do the rest. That ends at 3:15.