I'm sure you could use a different kind of roast. I prefer the chuck. Chuck roasts tend to be more fatty, but they give the best flavor and they always turn out super moist. I've tried rump roasts and they are always hit and miss. They tend to be more dry. Maybe that's why they are cheaper. I got this chuck roast at Sam's Club and it was a hit!
In a crock pot dump in this order:
2 cups baby carrots
5 small potatoes, cut up
3 cups beef broth, mixed with lipton onion soup
4 lb chuck roast, salted and peppered
Cook on low 8 hours
Let roast rest on warm for an hour and then scoop up vegies with a slotted spoon. Serve with hot rolls or biscuits.