What about 5.11 Tactical? Check out some of their bags.

I also have one of these for medical Voodoo Tactical Deluxe Professional Special Ops Field Medical Pack - Coyote Brown / Tan 15-8174 https://www.amazon.com/dp/B004YW5L36/ref=cm_sw_r_awd_d87dub05HT3V4. It's pretty big but great for internal storage.

This guy also comes highly recommended if you want to get away from all the tacticool stuff. I don't have one yet. SwissGear Travel Gear ScanSmart Backpack 1900 (Black) https://www.amazon.com/dp/B006HFJA12/ref=cm_sw_r_awd_u97dub0JK5TWT