I am also a shorter guy (5' 6") and know smaller inseam shorts help us look more proportional. The Ranger panties are a good option, but I have moved from them to Commando shorts (formerly under the 'woof' tradename). They were designed to be worn commando and do a great job of showcasing your bulge and your ass. YOU have both to showcase (hot damn that incredibly fuckable ass!!!!). The downside is that they are pricey. The upside is that there is no better way to market all that you have to offer!
Gym Shorts - Commando Corp