Never player a healer so far, but about to roll one...

What healer has the easiest time to solo heal a group through any existant non raid content? I don't care about dps, my main focus is on getting the group through any grpcontent with least trouble (I won't raid with this toon, maybe x2 if I have to but that's about it...).
So from what I read so far (correct me if I'm wrong on this, again I've never played a healer), shammy or cleric seem to be the easier choice for this... with Inquisitor>Templar for solo healing the group in some tso instances? How's the shammy compared to Inqui for this kind of scenario?
And in general: if you had the choice to pick a solo hlr for your tso group, what class would it be and why?
Oh and let's say it's a mythical hlr with T2 gear
Thanks in advance
