Recumbent bikes do not cause numbness in the nether regions and many models are more aero than upright bikes. Mr. Johnson loves this style of bikes.
(Y'all can quit waiting for this response.)

Or, your position related to the seat, handlebars, stem, etc. need adjustment. Bars/stem too low? Saddle shouldn't be pointed down. A different saddle could help. I previously had good luck with WTB Rocket V Race saddles on two flatbar bikes.