Sex Pistols
Misfits
Black Flag
The Ramones
I could see any of those being just as big in the genre some bigger as far as influence goes concerning punk. The biggest being the Ramones as they influenced a good deal of british punk.
Sorry...I don't care for the clash, sure they were big in the genre, sure they have influenced music. I just don't see them as being any bigger or more influential then the the other bands I listed...but that is me.
The thing that the Clash get more of was radio play compared to the others, mainly because they were more radio friendly and their style of music was not as abrasive as the others. Basically they were more commercially acceptable and in that aspect they achieved more success and in doing so I guess you could argue they helped open up punk to more and there lies the influence. However if you sit and think about it...because they were so commercial in their musical sound, because they were getting radio play on some mainstream stations...it kind of goes against what punk was all about...being non conformist and non commercial.
Just something to think about. I think they are highly overrated among the punk bands because to me they did not sound like most punk bands...they sounded more like 80's pop bands but they just had more meaningful lyrics.
Sue me.