Surely POW would be it? Eastern and Western Arthurs of course can be tricky in violent weather, but they're on-track, and I'm capable of doing both. (Well, I'm still not sure about the summit of Federation, but lots of walkers have managed it.) Of course, they are classic walks for a very good reason. Stunning country.
Likewise the Anne circuit - not 'really challenging'. Eldons? Well, same thing, really. Nothing challenging in terms of climbing - not as hard as Anne and her Circuit in terms of scrambling. Just *&%$#! thick scrub if you don't get the right lines. And nasty bouldering days in rain, ice and mist. We had bluebird days.
Prince of Wales, on the other hand - well, there ain't no easy way. Frenchmans - well, easy peasy unless you go straight up the wall, which sounds like what you're planning, Channas. Yes?
A chance of never coming back to Tassie??
How long is your trip?
Edit: We went out via Pigeon House Hill - obviously more of a challenge if you go through to Lake St Clair.