Tell us what wheels and someone will tell you the best tire for it.

Swiss side hadron 625

One of the better all-around tires is the Conti 4000s in the 700x23 size. This tire is almost always one of the most aero, has decent Crr, lasts a long time (for a race worthy tire) and has good flat resistance. Another option is the Attack which is a 22mm width.

I would bet that the Hadron was designed before the move to really wide tires started, so I would avoid any of the new tires in the 24+ width.

Your best bet for aero though would be to see if you can figure out what tire Swiss Side used in their tunnel testing. I bet they would tell you if you sent them an email.