Have a look here
I’ve done the Chemins du Soleil in the Prealpes a couple of times and the riding’s epic. You’ll get 10 days point to point riding out of it, of which you’ll spend a fair proportion on singletrack. It’s not the gnarly type – it’s the ribbons type. Also, the route’s signposted, and it’s downloadable on GPS so you’re not entirely dependent on signs.
some pics
Ash’s GR5 suggestion is a good one, but the riding’s going to be gnarly, and you’ll be carrying stuff. Interested to hear how much pushing is involved with this Ash.
If Germany/Austria/South Tyroll is your bag, you might want to take a look at Uli Stanciu’s Transalp book.
Transalp
That’s probably enough to get you going for the moment, and let me know if you need more info.