Quite accurate list, this...

http://digitaldreamdoor.nutsie.com/pages/best_artists-British-Invasion.html

1. The Beatles
2. The Rolling Stones
3. The Kinks
4. The Who
5. The Yardbirds
6. The Animals
7. The Dave Clark Five
8. The Hollies
9. Dusty Springfield
10. Herman's Hermits
11. Gerry & the Pacemakers
12. The Searchers
13. Peter & Gordon
14. Manfred Mann
15. Petula Clark
16. The Troggs
17. Donovan
18. The Zombies
19. John Mayall & the Bluesbreakers
20. Billy J. Kramer & the Dakotas
21. Chad & Jeremy
22. Wayne Fontana & the Mindbenders
23. Tom Jones
24. The Moody Blues
25. Small Faces
26. Freddie & the Dreamers
27. Cliff Richard
28. Cilla Black
29. The Shadows
30. Marianne Faithfull
31. Brian Poole & the Tremeloes
32. The Pretty Things
33. Them
34. The Fortunes
35. Alexis Korner's Blues Incorporated
36. Billy Fury
37. The Spencer Davis Group
38. Sandie Shaw
39. Shirley Bassey
40. Georgie Fame & the Blue Flames
41. The Swinging Blue Jeans
42. Adam Faith
43. The Honeycombs
44. Dave Berry
45. Dave Dee, Dozy, Beaky, Mick & Tich
46. The Merseybeats
47. The Graham Bond Organisation
48. Crispian St. Peters
49. The Nashville Teens
50. The Barron Knights
51. The Fourmost
52. The New Vaudeville Band
53. Unit 4+2
54. The Rockin' Berries
55. The Silkie
56. David & Jonathan
57. Lulu
58. The Ivy League
59. The Four Pennies
60. Heinz
61. Ian Whitcomb
62. Jonathan King
63. Chris Farlowe
64. The Tornados
65. Mike Berry & the Outlaws
66. The Applejacks
67. The Mojos
68. Johnny Kidd & the Pirates
69. The Sorrows
70. Steampacket
71. Jet Harris & Tony Meehan
72. The Alan Price Set
73. The Migil Five
74. Twinkle
75. Paul & Barry Ryan
76. John's Children
77. Screaming Lord Sutch
78. The Overlanders
79. Cliff Bennett & the Rebel Rousers
80. Hedgehoppers Anonymous
81. Pinkerton's Assorted Colours
82. The Big Three
83. The Joystrings
84. Bern Eliot & the Fenmen
85. Geno Washington & the Ram Jam Band
86. The Creation
87. Cyril Davies All-Stars
88. St. Louis Union
89. The Naturals
90. Zoot Money's Big Roll Band
91. Twice as Much
92. The Cryin' Shames
93. The Poets
94. The Remo Four
95. The Cherokees
96. The Paramounts
97. The Dennisons
98. The Mike Cotton Sound
99. Tony Jackson & the Vibrations
100. The Beat Merchants
101. The Birds
102. The Action
103. The Zephyrs
104. The Escorts
105. The Undertakers
106. The In Crowd
107. The Artwoods
108. The Roulettes
109. Mike Sheridan & the Nightriders
110. Rory Storm & the Hurricanes
111. Long John Baldry
112. Les Fleur de Lys
113. The Chants
114. The Rockin' Vickers
115. The Black Knights
116. Just Four Men/Wimple Winch
117. David John & the Mood
118. The Riot Squad
119. Lee Curtis & the All Stars
120. Faron's Flamingos
121. The Syndicats
122. The Eyes
123. Episode Six
124. The Downliners Sect
125. Sounds Incorporated
126. Tony Rivers & the Castaways
127. Beryl Marsden
128. King Size Taylor & the Dominoes
129. Ian & the Zodiacs
130. The Country Gentlemen
131. The Koobas
132. The Pete Best Four
133. Dean Ford & the Gaylords
134. The Wheels
135. Steve Aldo
136. The Rats
137. A Band of Angels
138. The Gamblers
139. The Mark Leeman Five
140. Peter Jay & the Jaywalkers
141. Freddie Starr & the Midnighters
142. The Cheynes
143. Jimmy Powell & the Five Dimensions
144. Keith Powell & the Valets
145. Gary Farr & the T-Bones
146. Paddy, Klaus & Gibson
147. The Toggery Five
148. The News
149. The Bobby Patrick Big Six
150. Herbie's People