Your comment doesn’t really square up with the list or with the comments of others on the thread.
Horses train easily but are quite stupid.Easily trained humans are as we call in general terms, sheep. One of the most intelgent dogs not even mentioned is a Jack Russel Terrier IMHO.Chows are very independent, hard to train but have an uncanny ability to reason as a JRT does.Being smart has nothing to do with being submissive.