1. Linda Gray
Forever and always, she will probably be my favourite actor of all-time. I think this performance is one of her very best. (Also, an honourable mention to Josh Henderson because he matched the quality of Linda's performance in this scene.)
2. Larry Hagman
For me, as much as I loved J.R. in all his nastiness and crooked business deals, his best performances were the down-and-out scenes after Jock died or the times when he realised how much he had f*cked up. One of my favourite scenes is when he's drunk and terrorises Sue Ellen about custody of John Ross in season 5.
3. Victoria Principal
Victoria's performance is always so meticulously delivered that I have always loved Pam, even when she makes the most stupid, selfish decisions... like this one.

Somehow, in spite of Jenna being the one who lost Bobby and left alone to raise a second child by herself
for the second time, Pam is the one I feel most sorry for.