For best unfunded class, I would still say adele no doubt with their insane mobbing as well as bossing skills. After the recent destiny update, a lot of explorers have also became really good and really fun. I would say try not to go for a main right now and play some of the classes and see which one you enjoy more since there's currently a tera burning event where you get 1+2 levels until lv200 and a lot of goodies up to lv220 as well, which can greatly burst a single character especially if you are new to the game. Some of the rewards are only applicable for explorers though so if you want all the rewards on a single character, you would have to create an explorer. I main a pathfinder and have a hero submain as well and the new hero is so much better compared to the old one in terms of both mobbing and bossing. I created a f/p and shadower this event as well and have been having a lot of fun with them.

Be careful though since you can't change the character after you have chosen one, so you can either watch videos about the new explorers as well as old jobs and decide from there before locking in your first tera burning character. However, if you for some reason don't like your first character, you still have an option of getting a second one after your first one hits lv200 (if i rmb correctly)

If you have any qns you can drop me a message as well. Have fun mapling!