What about a Labrador, I’ve had two, and a springer and even though labs get a reputation for needing exercise they are much more calm, steady and trainable (IMHO) than spaniels, and are happy to snooze for longer than you would expect.
Cockapoos seem to be the dog of the moment round here, they are by far the most common dog in our area but we meet a bunch of springer/cocker/cockapoo dogs daily and they are very high energy and seem to ignore most of what their owners shout at them, and they all jump up (in a friendly way but still cover their owners and myself in mud). I know some of this can be blamed on a lack of training but they all seem to be hyper and hard to recall. They also need time and money spent on grooming, the cockapoos we know in particular seem to have easily matting coats.
An alternative would be a Cavalier King Charles (not the plain King Charles with the buggy eyes) as they are much lower energy and I’ve never met a bad tempered one, as long as you look into the breed genetic diseases and go to a breeder who checks for them.
French bulldogs are also quite popular here but, apart from the obvious breathing issues, they do seem to be hard to train, especially toilet training, they seem to have accidents way past when you would have expected them to have got the message.
My neighbour have Border Terriers, they are great if you like furious barking.