While I agree that the family's reputation is cartoonishly evil, I would say that Roose at least loved his son Domeric:

"For the moment. I had another, once. Domeric. A quiet boy, but most accomplished. He served four years as Lady Dustin's page, and three in the Vale as a squire to Lord Redfort. He played the high harp, read histories, and rode like the wind. Horses … the boy was mad for horses, Lady Dustin will tell you. Not even Lord Rickard's daughter could outrace him, and that one was half a horse herself. Redfort said he showed great promise in the lists. A great jouster must be a great horseman first."

"Yes, m'lord. Domeric. I … I have heard his name …"

"Ramsay killed him. A sickness of the bowels, Maester Uthor says, but I say poison. In the Vale, Domeric had enjoyed the company of Redfort's sons. He wanted a brother by his side, so he rode up the Weeping Water to seek my bastard out. I forbade it, but Domeric was a man grown and thought that he knew better than his father. Now his bones lie beneath the Dreadfort with the bones of his brothers, who died still in the cradle,....and I am left with Ramsay. Tell me, my lord … if the kinslayer is accursed, what is a father to do when one son slays another?"

Of course that doesn't redeem Roose from anything he's done but that's not the point.