I mean, Ryan's character is clearly a psychopath in that movie. I just watched that for the first time a couple months ago and Hanks is great in it but I found it very hard to buy into the "romance". Obviously the plot structure makes it challenging but I don't think the script solved it.
I haven't seen the 2005 P&P, but I did recently watch the 1995 BBC miniseries and found it hit-and-miss; that said, I do think Colin Firth does a good job making Darcy initially irritating and ultimately compelling. I can't really imagine it working at all with a totally dull Darcy.