I recommend a Winegard HD7694P antenna mounted above the roof and aimed at 180 degree magnetic compass. Yes you can mount a Tv antenna above the roof ,
http://www.fcc.gov/mb/facts/otard.html . This will receive WTSP channel 10 and the stations to the , south west , south and south east. For one to four Tv's I recommend a Channel Master CM3414 distribution amplifier , for more then four Tv's I recommend a Channel Master CM3418 distribution amp.