Ex. Archers- Stay back, fire arrows.
Mages- Try some magic?
Warriors/Soldiers/Guards- Keep dragon distracted so that others can escape or attack, keep their distance but try to jab at it.
The point is, there are others who can wield weapons/magic in Skyrim, They can also fight. Although when you have a reputation for dragon slaying, they should probably back away from the dragon once all civilians are gone, and then let you do the rest.
What do you think?