Both King and Winegard each make a low profile (no crank) omnidirectional and a directional model. The directional models will have to be turned to best signal strength. The omnidirectional models are convenient but don't have the range of a directional model. Don't believe any manufacturer that claims to have a range of over 70-75 miles, at that distance the curvature of the earth becomes your enemy.
Since you do have the OEM Winegard which is directional, do you have it turned correctly? There are websites and phone apps that can assist in this, like antennaweb.org. Just type in your location and it will show you the available channels, compass direction, and distance to the transmitter. If you're near a town that has multiple TV stations, the actual transmitters are commonly located on the same tower.
Another option is amplification; I haven't installed it yet but Winegard makes a Sensar Pro Signal Meter. It has a visual and audible assist for aiming a directional antenna and a built in variable gain video amplifier up to 10 db. I also bought another variable gain video amplifier that can give up to another 20 db. Amplification will help with a weak signal but the more you amplify the more picture quality you lose.
Here are the devices I mentioned:
https://www.amazon.com/Winegard-RFL-...14&sr=8-3&th=1
https://www.amazon.com/CIMPLE-CO-Dis...zcF9tdGY&psc=1