I have one I've been using for years that I made up in my head. I've been meaning to write it down anyway
The basic ingredients are 2 cans of diced tomatoes (with liquid) per lb of ground beef. I toss this in the pot along with about half a diced onion, half a cup of chopped bell pepper and sometimes half a stalk of chopped celery. For spices, I dump in some Tobasco, serious garlic powder, onion powder, chili powder (probably a couple T on this one), red pepper flakes, salt and pepper, and then about a 2 teaspoons of unsweetened cocoa.
Then I walk away and life my life for an hour or so. Come back, taste, add more spice, and go live again.
One other option: I've also made this with adding in 1 cup of peanut halves if you want a substitute for the beans. Depending on how liquid-y you want it, you may need to add a little more, and I'd use some tomato sauce or beef broth.
Also, I've only done this on the stove and then set it on warm for a several hours. The crockpot may be more liquid-ish, so you'd just add more meat or tomatoes.
This is kind of vague, I realize, but I've gotten a lot of compliments on it. If you're comfortable playing around with spices, and can adjust to the liquid-ishness issue, it's really foolproof.