Hi Cameron.
I use the No Tune End Fed for 40m and 80m among other antennas from QRPguys.
Once set up, measured with an antenna analyzer and done they play very well. I use additionally a very light wire (Antenna wire from aramid (Kevlar®) fiber).
If you want to be more flexible I can recommend the UnUnTenna with AutoTuner or the UnUnTenna Plus. Of course depending on how much space you have to stretch the wire.
Otherwise just go ahead and try different antennas 
73 Marcel DM3FAM