Hunters are the least interesting class, but fastest traveling, on launch Hunters could level faster than any other class by a country mile, now its barely any difference and I wouldn't even come close to recommending a hunter any more.
When the game launched fast travel points were few and far between, now, they are everywhere, earlier levels, more available, very quick to get around. LIkewise rep "grinds" have become a joke so the harder traveling is also much quicker to attain since f2p happened. If you're in a kin or find a helpful hunter who can port you around to pick up the travel points quickly and very early, its even easier. But remember horses are from lvl 5 now, then proper horses from lvl 20, used to be nothing till lvl 35.
Anyway, travel aside, Hunters are basically the only class without a proper heal, which is why most hunters also choose man for the race as they get a class skill thats a 3k morale heal.
Rune keeper, loremaster, burglar, Warden, Guardian, etc, etc, all of them, every class is easy to solo. RK has the highest damage but can get easily overwhelmed in damage by a large group, Warden's are now the easiest to solo because, you have great mitigation, huge avoidance and large stacked healing while doing damage(the two main healing classes find it very hard to heal and dps at the same time, the only class who can really do this is Warden).
Warden's also get a few traveling ports, a run speed buff, they are easily the most overpowered, easiest to solo, easiest to do everything class.
I soloed about half of Urugarth with my Warden, ok he's level 65, a couple fights were tough, but overall it was very easy, only time stopped me going further through it.
Wardens the easiest class to solo, by a country mile, hunters fastest traveling but the most boring class in the game, until much further in the game you basically have 3 ranged attacks that look the same, even end game you only really go through 4-5 ranged attacks constantly, easily the most boring class to actually play.
Guardians with damage buff are pretty decent fun these days, with reactive skills you're tend to be doing different attack combo's constantly and different stances effect which attacks you'll be using, so semi varied.
Burglar is all about reactions and again different stances enable pretty different attack styles. Minstrels have very decent dps with their dps stance, RK's can heal and damage and are very fun to play with most of the coolest looking attacks in the game.
Lore masters have proper pets, plenty of options, wide array of crowd control and specced well, pretty awesome damage.
Hunter is the single worst class in the game by far, for a year they had so much more damage than everyone, plus travel, that they were awesome, they are pretty much the only class with no major changes from the beginning, travel for every other class is hugely improved and every other class is FAR more interesting to play.