How about a NS Eccentric. Mine is currently set at 140mm and makes a fun bike. Available in alloy or steel and at quite good prices. I bought mine as a spare trail bike that I could could use for some jumping and trials riding with a bit of commuting on late shifts. Steel frame and x fusion forks cost about $800 at time of purchase which makes a good resnable price build. Lots in funduro/hardtail thread.
Got a SantaCruz Chameleon which is awesome all round fun. Takes 26 and 27.5 wheels, single speed, (currently 1x10). Setup with 120/140 revs and dropper. Maybe selling it after breaking my elbow. Dont want to but dont think ill be riding enough to warrant it and my dually.
So many awesome trail/AM hardtail frames available now though.