Chpmer's parents for sure, or Dein and Terri (their names of you read Sharptooth Valley.) I will base my feelings on the movies that they are in- II and V- for my answer, since not everyone has read Sharptooth Valley, in which they are explained in more detail.
They're also dedicated since they come looking for Chomper.
I feel the exact same way.
Reason from The Great Valley Adventure (II)- Sharpteeth are aware that flateeth are their enemies and are thus hated by most of them. Chomper's parents could see by the Great Valley's number of inhabitants that they were very mismatched in power and that it could cost them their lives to got there. But they wanted so desparately wanted to find their child that they entered it to get him or her. This would be the equivalent of your child getting kidnapped by a California street gang, then you going to them in plain sight to rescue your child, knowing that they can and will try to kill you. Now that is not only devotion a family, but immense courage. I love parents who value their children over their one lives.
Reason from The Mysterious Island (V)- It is nice to have parents who know when to chat, but also know when action is needed, and are also able to go through with those actions when the time comes. Seeing a powerful foe- the green sharptooth- threatening their son, they didn't try to talk him out of it. They come up and simlpy attacked the one threatening their child. This sharptooth was obviously very deadly. This would be the equivalent of someone pulling a gun on your child but you charge the person in hopes of stopping him, risking your life in the process. Instead of wasting time by, "What do want?", "I'll give you anythng!" "Take me, and leave the boy alone," or anything of that nature, they simply took immidiate action and didn't waste time when their child's life was at risk. I love parents who talk a lot, yet know when talking is a bad option and action is the only answer.
Chomper's parents are among my favorite adults in the series. I know I can count on their immense strength when I'm in danger, yet have their warm nurturing all the time, simply because they love me so much. Besides, if Chomper's parents were my parents, that means that Chomper- my favorite official character- gets to be my brother. It doesn't get any better than that for me. This was a wonderful question and I'm happy it was posted. Later!