Hardly any manufacturers now make a truly long reach low stack bike… simply a reflection of catering to the masses.
Bikes I would consider long and low without undue body weight hanging over the front of the bike… QR CD0.1 & Illicito
Bikes that you could get long and low on depending on your hip angle… most of the tri bikes designed as tri bikes vs. UCI legal TT bikes with a reversible seat post.
Road bike wise… Treks with their H1 option, Canyon Aeroad CF SLX, Cipollini RB1000, Cinelli Strato Faster, Velocite Magnus…plus am sure a few other brands top end bikes if you tossed out the large headset spacers most come with and ran a -17 degree stem.
That’s my 2c…from a penchant for those types of tri and road bikes geometrically…
David