Just seen this! Nice one. How remote is it?
There are plenty of thru-hiking I'd recommend, mostly in South America as I loved our 4 months in Patagonia, but have unfinished business there. Huaraz, with the Huascarán National Park and Huayhuash around the corner is really suited for some long treks as well.
On the other hand of the spectrum also plenty of stuff in Europe sounds amazing, like the different high routes in the Alps and Pyrenees, probably more drawn to the latter of the two because usually less busy.
A bit less popular to the East, but there are loads of bothies in the Tatras that could be linked in a big trek and the Caucasus has definitely got my attention too.
My current dream is Tajikistan though.