I don't know but I'm guessing that it is pretty tricky to play drums and sing at the same time. Every limb is doing something different and then the brain has to remember lyrics. Quite a trick but then again - maybe it's easy?
I'm leaning towards the view that it's tricky because I can count great singing drummers on one hand, and it pains me to say that Ringo can never be considered a great singer so I can't include him even though I love him to bits. Play drums well and sing well - now that is quite a thing.
Okay so the tight five?
Levon Helm who passed away recently is definitely a member. Best moment for me is Life Is A Carnival when he sings - buddy would you like to buy a watch, real cheap! His shuffling drum beats motivated some of the best songs ever recorded - The Weight, The Night They Drove Ole Dixie Down, Up On Cripple Creek and on and on.
Karen Carpenter who died tragically distinguished herself on vocals but also was a mean drummer.
Mickey Dolenz is still with us thank goodness. Maybe not the greatest drummer ever but he was certainly talented in that area and one listen to something like Last Train To Clarksville and you know he could sell a song in a unique way.
Dennis Wilson - another tragic death to add to the list. Denny was a great talent - just dig out The Beach Boys' Sunflower album (his four songs are the standout cuts on that album - one of The Beach Boys best) or try his solo album Pacific Ocean Blue.
Okay - you're probably thinking that there are some other notable absences - Phil Collins? I'm not a fan of his singing at all but there is no denying his talent as a drummer.
And Don Henley? Yeah okay - Don is at number six so I do need to use my other hand after all.