I'd go with Judge for now. I hesitate a little because as
@jamesy2422 mentioned who knows what players are taking these days to enhance performance but, is not detectible. We won't hear about it for a few years, if ever.
>>> Assuming Judge is clean... Its him.
If not, its Maris (1961).
There will always be an asterisk next to the top row of guys. I don't care if it was 25 years ago. It still happened and won't be forgotten.
As a side note, I read that in the late 50s and early 60s there was some atheletes experiementing with eating Rocky Mountain Oysters (bull balls) to extract the steriods. Of course, I jests but something like that may have been the "performance enhancing drug" of the day.