What a lovely report you have
Stations is just about every direction. I live in Eden (Rockingham Co.) so I pick up some of the same stations you do from the Triad and some different ones. If you can put up an Antennas Direct DB8e without incurring the wrath of your neighbors I'd go that route. It can receive stations from two different directions (4 elements each way) so you may get a lot more stations. I have one, was disappointed at first (was doing better with a smaller C2) but changing the positions and clearing and obstacle, plus an extra five feet of height made a world of difference.
Here is my report:
http://www.tvfool.com/?option=com_wr...8e030ee6564038 Not nearly as lovely as yours but if you see real channel 40, down at the bottom of the pink, I can receive everything from there on up except for channel 25 (blocked by hill) and channel 3 (no low VHF antenna). I use the C2 on a separate feedline to get a couple of channels that are outside of the antenna coverage width of the DB8e.
You have several channels in green that could overload a preamp, particularly if an antenna is pointed in their direction. I'd try without the preamp first. I have an Antennas Direct PA-18 preamp and ADTech was concerned that channel 14 might overload it where I am. I don't point at that station (and stil get it because it is strong) and don't have the overload problem. The preamp really does help pull in the weaker stations for me, and since channel 32 is the only PBS I can receive I do need it. As always, your mileage may vary.
Now look at your report. Use the DB8e as high up as you can get it and experiment with aiming. I'd bet you can get all of the green and yellow on your report and quite a lot of the pink as well. That should give you enough channels, especially with all the secondary networks that have popped up, to keep you busy.
In my location it works out to about 54 channels of programming from the Triad and the Roanoke area.
Good luck!