I'm not sure how far you are from the stations you want to get, but here's what's working for me about 30 miles from the transmitters of my five basic networks (all of which are in different directions).
When I had my Dish system installed 2 years ago, I contracted with my installer to set up an OTA for HD. He installed an omnidirectional antenna with a built in amp and electronic rotor called an "Active 5 DX". He mounted it on the top of a mast pipe behind my dish. It works well. I have 2 VHF stations and 3 UHF stations. It picks up digital channels 8 and 10 surprisingly well. The antenna was originally designed for RV's but if you're relatively close in, it's one to think about.