I came across this page I hadn't seen before that shows rankings for common leather furniture manufacturers. This is just one site and who knows what conflicts of interests there might be but I generally agreed with the brands I know about (although the brands that are links are ones they sell and I would probably bump them down one category).

https://www.leathershoppes.com/showr...turer_rank.htm
(scroll down to the chart)

I thought I would post it here to generate some discussion to see what people think and also I commonly see "is this manufacturer any good?" type posts and this might be quick directional guidance for someone and prompt further research into certain brands and specific models they are interested in.