No matter what you do with any chili (meat stew with beans is not included here) - use a coarse grind and not hamburger grind.
Also, instead of using 100% ground meat, get a tri-tip or a chuck roast and cube it into 1/2" or 3/4" cubes at roughly a 50/50 ratio. Add some smoked brisket or chuck roast that has been cubed as well - absolute game changer.