thanks.
but seriously, if you want to get low, those are the companies that make the most aggressive frames. Cannondale is also quite similar. Basically, for a 53.5 effective top tube, you want a HT of 12cm.
if you are looking smaller, then Specialized is the most aggressive with a 51.8cm effective TT and 10cm HT; Scott is at 520mm 10.5mm; Cannondale at 520mm 11.5mm.
but truth be told, you could get “too aggressive” if the drop is too large and you end up constricting your airway