If you look for more “ethical” laptop for that reason, you won´t find many models, all main manufacturers have their “skeletons in the closet.” IMHO, this search will be pointless - even if you take your laptop apart, you will be never sure which horrible thing you will indirectly support. Does it even matter ? Accept that your laptop is a bit “evil” and do good things with it. Alternatively, I think best thing to do for you, is to get a refurbished second hand laptop, even from the ethically “horrible” manufacturers. At least you will spare the environment.
Closest to that I know is NovaCustom. Others - not so much, at best there are some who share schematics. Edit: I think Framework is still the best in that category.