You've got some great suggestions here for normal chili. In terms of authenticity though, after a visit to the mexican chili stall at borough market last year I made this Texan chili which absolutely blew our minds away and was like nothing on earth we had ever tasted.
In terms of flavourings it required the following for 2kg of cubed braising steak: chiles, soaked and pureed (either 8 ancho, or 6 ancho, 2 pasilla, 2 costena, 2 guajillos and 4 chiles de arbol), 6 cloves garlic, 1 cup strong coffee, 1 bottle beer, cinnamon, cloves, allspice, coriander, cayenne pepper, cumin, 2 chipotles in adobo and a Mexican hot chocolate tablet, grated.
No tomatoes or beans. Serve with grated cheddar, diced onions and tortillas.
It is insanely good and definitely incredible (in that we were incredulous how many chilis we were using, and yet it still wasn't mind-blowingly spicy). We still talk about it to this day and if I ever get up steam to go back to borough or see anchos in the supermarket, we will have it again.