I have used the Amigo Bravo XL and it had a great drop for my big fellow that otherwise looked like I dressed him in a mini skirt. Love this blanket.
I have it in the sheet and love the fit on my boy! It’s the only blanket he owns that doesn’t pinch him at the base of his neck and put pressure over his withers when he’s grazing!
Mine have held up fine here in chilly Connecticut.
Have you looked at the Premier Equine blankets? I have an Irish Draught mare who fits very nicely in their blankets (size 84" in the “Buster”).
I’ve found the drop on PE > Schneiders > Rambo original = Shires (roughly).