A Border Terrier may also be a good option. in any event I would look at getting something bred to have the hunting attributes you are after. Which would I suspect be a high prey drive, courageousness, tenacity, and intelligence. The terrier breeds from a reputable, well respected breeder would be my recommendation. I have preferred pure breeds for many years because you can look for the breed with your desired attributes. I am amazed what people will pay for a mutt. I saw a recent article where a young couple 50% paid more for a “cavoodle” (a mutt), than you would have paid for a very well bred purebreed poodle or cavalier king charles spaniel.
The trouble with crossbreeds is it is a real lottery as to what attributes you might end up with. This is not to say crossbreeds dont make an excellent pet. It is just harder to predict what you actually end up with.