BTCC Who is the Greatest BTCC driver of all time?

There has been a lot of discussion recently about the GOAT of Formula 1, and I think it might be fun to start a similar discussion related to the BTCC. I do not know very much about the BTCC pre-1991, so I would appreciate it if somebody would give me a list of potential candidates from 1958-1990 before I add a poll. Separately, I will also make my own personal rankings of the greatest BTCC drivers since 1991 soon.