The word organist is an anagram of roasting.
The next possible longest words have seven letters and include ratings and soaring.
Shingle is "english" as an anagram.
George Guest - English organist - died in 1831.
George Guest - English organist - was born in 1771.
The anagram of diametric is matricide.
British English spelling: organist, organise, organiser, organisation, etc.
The anagram for countries is neurotics.
Purcell was an English Organist
The anagram is cobbler (shoemaker, or a type of dessert).
There is no anagram in English using all of the letters in potato.
Shingle
prettiness
Purcell was an English Organist