Since I sent the list in reverse order, I will post it in the same way:
20. Art Fleming
19. Bob Barker
18. Wink Martindale
17. Peter Marshall
16. Monty Hall
15. Groucho Marx
14. Bert Parks
13. Geoff Edwards
12. Jim Perry
11. Jack Barry
10. John Charles Daly
09. Alex Trebek
08. Gene Rayburn
07. Garry Moore
06. Clifton Fadiman
05. Dick Clark
04. Bud Collyer
03. Allen Ludden
02. Tom Kennedy
01. Bill Cullen
Of the notables that I left off the list, some were ones whom I felt that I had seen or heard an insufficient amount of work in order to make a clear judgement (Jack Narz, Art James), some were lacking in terms of influence (most hosts in the last 25 years or so), some were ones that I had "issues", to put it delicately, with their style of hosting (Dennis James, Richard Dawson), and still others didn't quite make the final cut (Chuck Woolery, Jim Lange).