For a cooperative game I suggest Pandemic. Spirit island is fun but it's pretty complex even for seasoned boardgaming adults. Pandemic is very streamlined to play, is challenging, and is one of my few 10/10 games.
For a competitive game I recommend Space Base. I have played this with 8 year old children and my 80 year old mom. Its a great design that always has something for you to do in the game, even on other people's turns. I also havent had anyone say they didn't like it, with a lot of rare guest occasional gamers specifically requesting to play it again. Also 10/10.