If it could have been so many, then it will be, nobody did.
Stanley Wells, Shakspeare expert and long-time chairman of the multi-million dollar "Shakespeare Birtplace Trusts" puts this in an interview with Swiss TV (SF1-(video start at 16.58.min)
The very idea that so many people have been suggested as the author of Shakespeares works in itself to me is enough to show that it is a mad idea, its just crazy !!! (click Blog 200!)