To get an idea of which stations are carrying which network(s), take a look at
http://www.rabbitears.info/market.ph...n=WHIQ#station
Some stations carry only one program, others carry several.
I would suggest using an Antennas Direct DB4e. Start with the antenna facing about 220°, which should give you the strong local signals. Then try turning the antenna toward the west slowly... you may be able to add the CW affiliate WHDF without loosing the main group of stations. I would try running this with no amplifier. When I run the numbers it looks as if you have enough signal power to drive an 8-way splitter and the loss of 100' of coax, assuming 15 dB of loss due to the roof. Be sure to terminate unused splitter ports with 75 ohm resistor caps.
I would also add an Antennacraft Y10713 aimed at real channel 11, WTZT. According to rabbitears.info, they carry RTV network, which runs reruns from several past decades of TV history. Beginning aim point is going to be about 270°. Always fine tune the aim before final tightening of the clamps.
To combine the two antennas, use a UVSJ.
http://www.amazon.com/Antennas-Direc...&keywords=db4e
http://www.antennacraft.net/Antennas/AntennasVHF.html
http://www.solidsignal.com/pview.asp...nna-%28UVSJ%29
http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051