You can check this thread:
S&S Physique (humorous, but not really joking)
You can also check YouTube or Instagram for:
Pavel Macek
Harald Motz
Levi markwardt
Strongfirst instagram
Derek Toshner
(I might have miss spelled some, sorry).
It's unlikely any advanced kettlebell practitioner limits only to kettlebell. Why would he? But it's the main tool for the ones mentioned above.
From your stats, I'd say that it's unlikely you'll look bad if you get to 15% body fat. If you become strong with the kettlebell and reach 15% body fat, you'll be happy with you appearance, that's for sure.
A good thing is that kettlebells are great for body composition. Given your strength and body composition, I assume you dont like cardio? Ballistics can give you some of the cardio benefits in a more enjoyable format for someone who prefers strength over cardio.