I grew up with a long hair german shephard and she had the most beautiful temperament! If you are looking for a large breed that doesn't require much exercise though, get a Rhodesian Ridgeback!! They are so placid an lazy! We have 2 and both prefer to laze about all day and do next to nothing. They hardly malt where as German shepherds drop lots of long wirey hair.
They are great with kids and will happily lay on the floor and play with them
Try are on average 45-50kg where as a GS is around the 35-40kg mark.
Ridgeys also have better hip scores then shepherds so less chance of hip dysplasia which is a terrible disease to have to watc a dog suffer with 😔