Here's how they all did in the official poll back in 2008.
http://www.morrissey-solo.com/threads/83646-The-Moz-Smiths-Top-100-FINAL-RESULTS!!/page5
Best composers:
1) Morrissey/Marr, average score: 8,74 (68 songs)
2) Morrissey/Armstrong, average score: 8,17 (2 songs)
3) Morrissey/Street, average score: 8,03 (26 songs)
4) Morrissey/Boorer, average score: 7,94 (22 songs)
5) Morrissey/Whyte, average score: 7,69 (62 songs)
6) Morrissey/Nevin, average score: 7,66 (15 songs)
7) Morrissey/Langer, average score: 7,54 (3 songs)
8) Morrissey/Cobrin, average score: 7,53 (3 songs)
9) Morrissey/Tobias, average score: 7,52 (8 songs)
10) Morrissey/Whyte/Day, average score: 7,42 (3 songs)
11) Morrissey/Rourke, average score: 7,23 (3 songs)
12) Morrissey/Boorer/Day, average score: 6,35 (2 songs)
13) Morrissey/Farrell, average score: 6,17 (2 songs)
Like Street, Alain's written some brilliant songs but, unlike Street, he's also written vast amounts of plodding, mediocre, indie-pop filler.