There is no "high quality" leather sofa available online. Just as there is no "high quality" fabric sofa online: )
A thousand people will argue there is, but it's truth.
Hancock and Moore is excellent, Taylor King is very good as well.. You need a quality brick and mortar furniture store or a designer for either.
Depends your budget for anything else, or even online. Construction and leather affect price. If you must buy one online ? I would look at Arhaus, or Room and Board - both have good customer service ....
Neither of those will give you the vast leather selection available at the "excellent " level.
You must remember too, , you can't flip a seat or back cushion with leather....( the back side has a breathing panel sewn in) .
Q
Thomas Moser
Q