[Antennas] Help! Tv reception lousy in middle of town!

[Rod]

Help me build an antenna. Anyone have plans for OMNI with gain. Need VHF and UHF plus HD channels.
I have tried nearly every (internal and external) antenna I can find but still lousy reception in the middle of town. I must live right in that lousy spot of multipath or something to that nature. Guess I could build 4 Yagi's and point at each station. I have a 50ft. ham tower, but dont want tv antenna on it because of potential lightning, but I can mount a lower pole if I can find the right plans for a good antenna.
Any/all ideas and input are welcome.
Thanks much,
Rod