Who is THE one guy - any instrument - who embodies what a great showman is, i.e. great / good at his chosen instrument and as an entertainer?

I can think of quite a few (Dickinson, Hagar, Dio, Sambora, Tommy Aldridge, Steve Lukather, etc.) but my vote would go to David Coverdale (1973-1988). After that his showmanship was still brilliant but the voice started to show some cracks.

I always thought the DC had the moves and the voice. He had his own style and I cannot think of any other singer having such a great package apart from him during the above mentioned 15 years period.

Paul Rodgers is a good singer but quite boring on stage. Hagar is top in both fields. It then all comes down to musical preferences, and DC until 1988 was unbeatable in my book.