
Polls like this have been done quite often,I know...I guess one more can't hurt.
This is not about the whole package (best entertainer,frontman,number of years in the biz),it's just about the quality of the voice,skills,technique,range,uniqueness...you get it.
These are the singers that I came up with from the top of my head,the ones that usually make it to the list,but if there are others I forgot,please use the option and post the name(s).
I was tempted to add Ann Wilson,but while she has no rival among the female rock singers and even beats some of the males,an all-male Poll is better in this case.