I grew up with ducks... was my moms obession at the time. I have seen many muscovies who are very friendly, I just do not like them though.
We had a sweet tiny black cayuga duck who was like the family dog. He was very tame. But very much so imprinted to my mom. The indian runner we had that we got at the same time, was never tame, always skittish. The indian runner female though was an excellent mother, very broody and raised many ducklings. She would even try to sit on our silkie eggs.
I had a Pekin duck that was extremely tame, lived in the house till he was just too big to manage inside, loved riding in a box in a car to go over to my moms to swim with the geese and swans every day. I can still remember peoples faces blinking as the big white duck peered at them from the passenger side of the car. He would lap sit for hours, better than any cat. He was a doll... I have never had a pet duck since as sweet as he was. Miss him....
I have had several geese (Emdens) come close to the Pekin, they can be extremely loving and imprint to humans rather easily when very young (we hatched ours from eggs).
We also had a quartet of red heads, who were spastic and funny, not as tame as the more domesticated ducks, and kept finding their way into the swimming pool. They were fun to swim with! We also had a pair of Mandarin's that we never even tried to pet... they were scared of us even after many years.
So my vote Pekin or Cayuga or Emden goose ( if you have room)
NB