You can do magic with makeup, so don't underestimate it's power! From how-to here are some good tips on using makeup to make your face look thinner: 5 Tutorials to Teach you How to Make your Face Look Thinner - Makeup Tutorials:
Maquillaje natural para diario, tutorial con las partes del párpado delimitadas
34 Best Drugstore Makeup Products - article by Women's Health. Having used both drugstore and department store/Sephora products, I will say don't discount the drugstore products! They work just as well if not better than some of the super expensive stuff.