randeunner bars

but there's not much lift/reach added before they drop. just get some brake hoods, gut the levers out if you don't like them, and ride hoods.

it's also possible your stem is too short, bike fit is tricky but if you feel like bullhorns are better for climbing than drops are, you may have bad fit. nothing's better for climbing than drops on a bike that fits properly, for most people.