Hate to say this but... DUH !

Ask anyone who rides distance regularly and they'd tell you to bring your bars close to level with your saddle and not to carry a backpack.

If you aren't running a brake it would be easy to set up a second set of bars you could swap in... and you would probably need a riser stem to bring them up.

Bar choice is a personal thing... I prefer rando bars over all others and Nitto makes good ones.

Trekking bars may also be a good solution as they offer a lot of hand positions and you can rotate them up and down to change fore aft position and their height.