Dude I have sold a lot of vests to bigger guys than you but what works well on mannly man size guys is a chest rig.
It'll carry your mags and offer dump pouches on both sides. the shoulderstraps will accomodate your height and allow you to set the pouches where they are comfy to draw from. The waist band will wrap around and secure it to your frame so there's no flopping around. these go around $50. from condor and you can definately go up in price from there, as every major Tact gear Company offers one. these are great for summer as well as you won't be sweating under a full size plate carrier.