very good idea for a list …and cool to see how many bands are actually Scottish 
of course my personal list would look a bit different:
1 Jesus and Mary Chain
2 Associates
3 Arab Strap
4 Teenage Fanclub
5 Primal Scream
6 The Proclaimers
7 Cocteau Twins
8 Belle & Sebastian
9 Franz Ferdinand
10 Mogwai