I've always considered Angela Channing to be much more sympathetic than J.R. of Alexis; it's been a while since I've seen "Falcon Crest" but I can't remember her doing anything as evil as either of them.
I think Angela's exploitation of the vineyard workers as depicted in FC's early years is pretty despicable: paying minimum wage, no health, no pension, housing them in shacks with inadequate sanitation. There are several stories of employees or smaller vineyardists in the valley whose lives and homes she ruined, and who then ended up dying broke or sick. That's not to say JR would have treated his workers any better but he (and the show) was distanced from them; he didn't live on top of his oilfields the way Angela did her vineyards. And of course, FALCON CREST wasn't as interested in poor immigrant workers as it was in its glamorous lead characters so they didn't have as much dramatic impact. But she was pretty cruel to her family too: breaking up Julia's marriage, 'taking' Lance to raise as her own, keeping Emma hidden in her room for the best part of a year. Of course, as the years went on, she became increasingly diluted and comedic until she was almost harmless.
Was Richard really a villain?
Again, in his first couple of years, he was really twisted and ruthless and maybe even a little unhinged. You understood why - he was the exiled orphan like Adam Carrington, but he was more dangerous and more powerful than Adam. But then he got softer and nicer too.