PP have mentioned a papillon. I had one growing up (5+, though there was another elderly one before that which I can't really remember). They're my dream breed - one day I'll have another but DDog was accidentally acquired and needs to be an only dog.
He came to us from a breeder at 18 months as he'd been intended for a show and stud career, but failed at the latter (!!)
Temperamentally nearly bombproof, except chasing cats (not a problem for us tbh) and he got a bit snappy with bouncy puppies in his twilight years (understandable tbh). Loved everyone, including greeting a burglar he disturbed like an old friend 
He was bright but with 20/20 hindsight badly trained (eg he came back when called in his own time) but that could have easily been sorted with basic things like, erm, a bag of treats, but his main carers were very very very old school (think 1920s) from a generation where dogs just existed rather than having the high obedience expectations people have now. Lots of papillons do things like agility.
Exercise wise I think he got an hour or so a day (but may not be accurate as I was so young when he was young) but I don't remember him being too twatty even if walks were a bit shorter. Unlike the pomeranian, who would sit down and not move when she'd had enough, he would walk however far you were walking.
Not much went wrong with him health wise. Old age deafness, heart murmur, teeth had to be pulled out in his old age... Very basic stuff, until his final unexpected and short illness at age 15.
He didn't bark much but I believe some of the breed do. I don't think he ever stopped shedding either - we were finding long white hairs for years after he died (though perhaps that says more about the cleaning than anything else!)
To me he was the perfect dog. However, this is one person's experience with one dog, possibly with slightly rose tinted specs on, and viewed through the subsequent experience of taking on a JRT x with ishoos who could make most dogs look easy! Worth having a look, however, if you don't mind the shedding!