Hi Monday,
Dragon Link, TBS Crossfire, and FR Sky R9 are all well known long range options for long range transmission. (I don't remember about Dragon Link but Crossfire and R9 both run at 900 Mhz)
For FPV, I echo Bajadre's suggestions for either 5.8Ghz video (Look at the 5.8Ghz Clearview Race Video Receiver) or 2.4ghz video (Check out the TBS Groundstation 2.4 Ghz) or you can even go as far down as a 1.3Ghz FPV video. (Remember that the lower the frequency, the better the penetration rate through objects and longer the range.)
Hope this helps!