Yes, the great British icon Brian Blessed was once offered a role in Doctor Who. Not as King Yrcanos. THE role. As The Doctor. Let that sink in. Reportedly, Mr Blessed was offered the role very early in a career ranging from stage to film, remembered best amongst the sci-fi fandom as Prince Vultan in Flash Gordon.
He states that:
”After I was in Z Cars, the head of BBC serials took me aside and said,
‘We’re thinking of having a young Doctor Who and we’d like to cast you’.
But it clashed with other things”.
[Source: Radio Times]