But to be honest the Empire doesn't exactly care much about its ordinary people either... otherwise there wouldn't be as much poverty and suffering as there is there. And at least in Bretonnia the knights themselves do value courtesy and respect (even if only toward each other), whereas the Empire is fully prone to all the failings of humanity, as well as being extremely fractious and prone to civil wars (compared to the unified Bretonnia). On top of that, the Empire has rarely helped anyone except themselves, whereas the Dwarfs and Bretonnians have not only both risked their lives to help the Empire on many occasions but have also gone to help other human kingdoms as well.
I would put Dwarfs at the top in terms of the Good scale due to their word being their bond and their respect for anyone who doesn't betray them, then Bretonnia, then High Elves (who vary between helpful and hindering as regularly as clockwork), then the Empire, then Lizardmen (who will attack any of the Old Ones' creations in the fear of them pillaging their Temple Cities but do things for the greater good of the Great Plan), then Wood Elves at the bottom (who will attack anyone who enters their forest regardless of what species they are and don't adhere to a Greater Good like the Lizardmen do).
I also think Tomb Kings should be classified as an Order faction, because though they are ruthless and tyrannical they still wish to bring order to the land and have memories of a human past. I can't see them allying with brutal Chaos Warriors or barbaric Greenskins against a Bretonnian or Imperial army, that's for sure. However they are still on the lower level of Good alongside Lizardmen and Wood Elves.