Well I finally found the disposal I want, a genuine vintage (albeit a very late example) Waste King garbage disposal! This one is a Thermador branded unit, 3/4 HP, which I think is as powerful as they get, not sure they had a 1HP version ever... I bought the thing used and feared the worst, but it’s in excellent condition really, I’ve read that the grind ring in these doesn’t really wear down and it seems to be true! See link for video of it having some fried chicken bones!