Agree also an actual poodle. Not a doodle - every single one of them comes from a horrific backyard breeder. "Not but we saw them in a lovely home" sure but you didn't see the breeding sheds where the bitches are kept until they are discarded aged 5-6.
Actual poodles are fantastic dogs. Groomed with a teddy cut they are indistinguishable from your cockerpoos - but without the unknown quantity that a cocker adds into the mix. And the people that breed them tend to be actual breeders.
If you want the lowest maintenance dog ever / that actually will be happy with 4 miles on lead a day and will sleep the rest of it - a retired greyhound. Most rescues will quite rightly not rehome to a home with young children - but greyhound rescues might because they are the gentlest souls imaginable.
It might be worth considering why rescues don't rehome to households with young children. It's not because the dogs are dangerous- it's because most dogs would prefer not to live with small children who don't respect their boundaries and stress them out.
If you get a puppy it will bite and mouth and they have sharp teeth. Then it will go teenage for a while and might be doing that with grown dog teeth.
I've fostered quite a few dogs who had absolutely nothing wrong with them, wonderful pets - but who were surrendered because puppy/teenage behaviour and small children don't mix.
Thee dogs were perfect, not aggressive, not resource guarding, not a sly behaved - just put in a situation where they were set up to fail.