I have a number of posts on laid-back tough guys.
Below is my favorite example of a romantic tough guy. He is the sheriff, played by Wade Williams, from the Bones episode "The Witch and the Wardrobe" in which Angela and Hodgins get married. He is a stickler for the law, an upright noble man who believes in his calling.
He is also a romantic, so when Angela and Hodgins get married in his jail cell, he throws confetti!
The friendly judge who marries them is played by William Stanford Davis.