I had a Dunlop American elite 200/55-17 fitted to the rear of my Fatboy in July 2016 and have just had it replaced with another after 24,282 ks
I ride every chance I get in all conditions and spend a lot of time in the mountains and even though I have 2 inch overs and the boards moved forward, there is plenty of scraping and the Dunlop feels better than anything else I have tried.
At $300 fitted, it's maybe the cheapest of the lot too.
I read somewhere that the American Elite was made to rub Harley's face in it for ditching their tyres on some models.
I found them to be easily as good, if not better than the Pirelli, on my bike anyway.
The Pirelli would let go much easier in the wet than the Dunlop.
I also had a vibration from the front Pirelli at 70 kph which was annoying.
Below is the milage from all rear tyres since the bike was new.
1st tyre. Harley Dunlop, 10,612 ks
2nd tyre. Pirelli Night Dragons, 13,549 Ks
3rd tyre. Pirelli Night Dragon, after cams fitted, 12,052 ks
Have one on the front of my street Glide, steers a touch strange but is wearing well.