Love this thread
We have a chap who lives near us and when he walked past the gates one day, my eldest GD (at the time, she'd have been about 6 years old) said 'nanny, Roy Cropper has just walked past your house' - and he does look like him, even down the coat and small bag so to this day, he is known to us as Roy Cropper
The last gardener I had had a shock of blond kind of frizzy hair and was instantly nicknamed (by my son) as Sideshow Bob (Simpsons) - when I'd asked around about this gardener, nobody knew him, the minute I said he looked a bit like Sideshow Bob, they all knew who I meant!
Chap who owns a local off-licence is nicknamed Slithering Sam because of how he sidles up to you and tries, in a wheedling, slightly lispy voice, to sell you stuff.