Need advice for my setup

[ebe326]

I am looking for the best antenna for my situation. I have 3 TV's I want to use all from a single antenna for digital signals. Two standard TV's and one LG 50PC3D HDTV. The cables in my house come together to a multiswitch in my attic then out to a satellite dish. I will be removing the dish but I would like to continue using the cables even if I have to change the multiswitch to whatever is appropriate for antenna use. The total length of the lines is around 60 feet. According to the FCC website, I have strong signals all from the same general direction. My zip is 32754. I would prefer either an indoor antenna mounted in my garage or something(indoor or outdoor antenna) mounted in my attic. I realize it's not ideal but since I have strong signals I'm hoping it will work. Of course if I have to I will mount one outside. Thanks for any help.
Also, my roof is asphalt shingles.

David.