My husband isn't obese or over weight even but he's headed both those place if he doesn't do anything about it. I noticed you also have a goal to get healthier and what worked with him was driving home the fact I need support. When he eats badly around me it tempts me to eat bad as well. He always tells me he's fine with my weight and says I am not obese (I am though). I tell him I want to be healthier and I want him to be healthier as well.
I think now he sees the sodium and fat (chips,pizza, chicken strips) will catch up with him. He still struggles but it helps. I honestly think the most important things to do is not have certain things in the house. Especially "trigger" foods. My husband was one of the pickiest eaters I know he wouldn't eat veggies, beef, fish, pork :p His diet was mainly kraft dinner, chicken, pizza, fries, chips, chicken fingers, and corn. He now eats most of the things he wouldn't before except fish and I would like to see him eat more veggies.
I honestly think if we show them how we want to be healthier and how hard it is when they eat badly then they will eat well to help us.
“Though my soul may set in darkness, It will rise in perfect light, I have loved the stars too fondly To be fearful of the night” ~Sarah Williams
"When the snows fall and the white winds blow, the lone wolf dies but the pack survives." - Ned Stark ~A Game of Thrones by George R.R. Martin
"Winter is coming" Stark House Motto ~George R.R. Martin A Song of Ice and Fire Series