No biographical subject is ever on hold with the orthodontist. If there's a dry spell, it's your job to curtail or eliminate it.
In an ideal world, the perfect biographical subject would have been the star of his penmanship class at grade school - and would thereafter write an English that positively sings.
I don't think there is ever objective biography. Our vision of our subject is always shaped by who we are. So I do, of course, think the biographer's view is always something to keep in mind.