English to French Art/Literary Poetry & Literature

Voici le contexte :
With regard to medicine, a quack was ``one who proclaims his own medical abilities in
publick places''. There were few who quacked louder than Taylor. Eighteenth century ophthalmology in Britain lagged behind that on Continental Europe, and the oculists practicing it were duly designated by this derogatory label: ``Among these travelling
quacks the name of `Chevalier' Taylor stands pre-eminent for unblushing effrontery, blatant self-adulation, and all the methods of the charlatan'' (Coats 1933, page 132).
He was known to Dr Johnson who said of him: ``Taylor was the most ignorant man I ever knew ... he was an instance of how far impudence will carry ignorance.''
Dr Johnson's view of Taylor's unparalleled ignorance was itself overblown.

Je suggère, sans conviction :
Il était un exemple de combien l'impudence peut être fille de l'ignorance.
Des suggestions ?