What do you mean the best pole lap ever? The fastest? Then take a look at
http://uk.sports.yahoo.com/040911/3/6g45.html
Anyway, FYI, from 1950 to June 2001, the highest percentage of poles won is this (Ayrton in an honorable 4th place):
Pos Driver GP Poles Pole%
1 Juan Manuel Fangio 51 29 56.9
2 Jim Clark 73 33 45.2
3 Alberto Ascari 33 14 42.4
4 Ayrton Senna 162 65 40.1
5 Stirling Moss 67 16 23.9
6 Michael Schumacher 145 32 22.1
7 Eugenio Castellotti 14 3 21.4
8 Giuseppe Farina 34 6 17.6
9 Mika Hakkinen 148 26 17.6
10 Jackie Stewart 100 17 17
11 Nigel Mansell 191 32 16.8
12 Alain Prost 201 33 16.4
13 Damon Hill 122 20 16.4
14 Jochen Rindt 62 10 16.1
15 Jacques Villeneuve 82 13 15.9
16 James Hunt 93 14 15.1
17 Stuart Lewis-Evans 14 2 14.3
18 Mario Andretti 131 18 13.7
19 Niki Lauda 177 24 13.6
20 Phil Hill 50 6 12
21 Nelson Piquet 207 24 11.6
22 Froilan Gonzalez 26 3 11.5
23 Ronnie Peterson 123 14 11.4
24 Rene Arnoux 164 18 11
25 Jean-Pierre Jabouille 56 6 10.7
26 Jacky Ickx 122 13 10.7
27 Tony Brooks 39 4 10.3
28 Jack Brabham 128 13 10.2
29 David Coulthard 107 10 9.3
30 Mike Hawthorn 47 4 8.5
31 Graham Hill 179 13 7.3
32 Johnny Surtees 113 8 7.1
33 Felice Bonetto 16 1 6.2
34 Gerhardt Berger 210 12 5.7
35 Didier Pironi 72 4 5.6
36 Alan Jones 113 6 5.3
37 Chris Amon 108 5 4.6
38 Teo Fabi 71 3 4.2
39 Carlos Reutemann 146 6 4.1
40 Patrick Tambay 123 5 4.1
41 Emerson Fittipaldi 149 6 4
42 Keke Rosberg 128 5 3.9
43 Jacques Laffite 180 7 3.9
44 Clay Regazzoni 139 5 3.6
45 Dan Gurney 87 3 3.4
46 Wolfgang von Trips 29 1 3.4
47 Riccardo Patrese 257 8 3.1
48 Peter Revson 33 1 3
49 Gilles Villeneuve 68 2 2.9
50 Luigi Villoresi 34 1 2.9
