Melvyn Bragg, for The South Bank Show and the radio programme In Our Time. Not a twat at all.
Michael Palin may well be the least twat-like man ever.
Alan Moore created Watchmen and V for Vendetta. This alone makes about as far from being a twat as it's possible to be.
Brian Blessed couldn't be a twat, even if you paid him a million quid and offered him a night with Lauren Laverne.