In my area, and depending on ones location, the biggest majority of the populus needs a 'piggy back' ant. (two directional ariels), each pointing in differing directions, as all but one or two station are in the same general area. SE. The other major affiliate is NNW.
Beyond that apparatus, a 'rotor' type antenna + digital tuner would be my pick. The rotor will turn or point the aerial in the exact direction of the broadcasting station via remote control. Usually that device is a small box with controls for memory positioning of most or all the local broadcast towers. Naturally a rotor antenna is a powered motor driven unit, so bare that in mind.
Once set for each station, just punch in the ch. and then switch the tuner to that ch. I'd suspect now or very, very soon, these devices will be all in one units, and not require the double moves of selecting both station direction for the antenna, and the ch on the tuner as well.
Check it out.
Otherwise if all the affiliates are in the same area, only your standard type (unidirectional) antenna would be needed. Then just a proper height and compass will be needed
. Call the local ch in your area and theyll tell you where they planted their broadcasting towers so you can aim your aerial without the need for another person to yell when the ch is coming in good
although having another about when dialing in the antenna is a good thought in any case.