You can point to 78 degrees, or 308 degrees. Both will require a UHF/VHF combo antenna.
If you point to 78 degrees, WLPB PBS in that direction is weak. If you point near 308 degrees, you have a weak signal from NBC 7 or 35.
I'm going to suggest an Antennacraft HBU-44 pointed to about 78 degrees - and since the signal from PBS 23 is quite strong, you should get it off the back of the antenna. You could also try pointing the same antenna to about 285 degrees to get channel 7 NBC, and the others to the NW at about 308. ABC, CW and Fox are booming strong and should come in almost anywhere you aim an antenna. Because they are so strong, I advise you not to use an amplifier or risk overloading your tuner.
I suspect that with the HBU-44 and a lot of playing around with the aiming, you will find a direction that gets you stable reception of all the major networks. But if not, then adding a rotor will get them all for sure - but only as a last resort. Rotors are problematic with digital TV.