Teetotaller

He's a teetotaller.

Tom drank heavily in his youth, but is now a teetotaller.

Tom is a teetotaller.

He was no teetotaller; though a moderate man, he had full belief in the medicinal virtue of brandy.

My great aunt was a staunch teetotaller.

The six drivers foregathered and the rather surprising discovery was made that five out of the six were teetotallers.