There's a few things about the first post I don't understand.

You want a low fantasy setting, but it should still have magic in it?

Where does the magic come from? If you answer: "uh, some deity or demonic forces, I guess" then its pretty much a far step away from low fantasy to high fantasy, as it gives reason to believe that there are a bunch of gods and demons strolling about, dealing out magical powers on a whim.

Limiting the magic doesn't really make it less fantasy, there's still magic and it must come from somewhere.

European academics in the 16th century developed a discipline called Demonology, where they studied how witches gained magical powers and from what sort of demonic forces it derived from. Sex with demons is a common way of gaining powers. Being born half human and half demon is another good way of possibly do something magic. Naturally we think of these demonologists as kooks today, but their fear was real at the time that something unnatural was going on in the world. Demons everywhere, the end of the world is nigh! This is a low fantasy setting. The belief that there is something terrible going on, witches everywhere.
And don't forget all the rituals the common people must do to avoid bad luck or what have you! Throwing salt over the shoulder, having silver in the baby's crib, hanging up horseshoes above the door, these sort of small things, they are all linked to the belief of magic.

You hit level 11 and must resign your character. QQ

Instead of Spelunking Warrior;

+++Captain Lasso!+++ (or whatever else that fit)
You can easily ensnare enemies with ropes within close and reach range. Roll+DEX.
10+: all your opponents within reach range are tied together, making a bundle of trouble for them! Pick two:
*All allies take +1 forward when attacking the tied up opponents.
*All allies does an additional d4 damage towards tied up opponents.
*Take +2 forward on the next Defy Danger in this combat.
*Disarm the opponents of everything in their hands.
7-9: You manage to lasso one opponent. Pick one of the above options.
Miss: Ops! You get tangled up in your own ropes! The GM can be inspired from the options above to make trouble for you or your allies.

Need more monsters! MOAR!

Shadowmage
Clever bastards, group, magicians.
Instinct: To experiment and sacrifice to appease the dark gods.

d8+1, 9 hp, 1 armour
+Shadowspells. Near.
Use shadows to suffocate, blind, bind, disarm.
++Can drain life for half the damage to heal the shadowmage.

The lab is ready, the drooling, hunchbacked assistant is ready, the stars are right: Lets create some awesome monsters!


Here's a funny zombie:

+++Carneomancer's pet zombies+++
Group, drooling, foul stench, you know, much like the usual zombies.
D6, 11 hp, 1 armour.
Here's the extra fun:
+On low hp, followed by a character's miss: Corpse explosion! The zombie(s) explode in order to make short work of their opponents! Bits of zombies and bones fly everywhere! Other dead zombies also explode!
+Corpse explosion: (1d6 x nr of nearby zombie corpses) +1, near, piercing 1.

Nice! I like the paladin and cleric much better now. The wizard, I was thinking about doing what you propose, maybe its the right thing to do.

Maybe its the wizard that could Parley and alter minds, but with Int instead of Cha. Its sort of the same thing though, either Charm or Enchanting Voice, you still end up screwing up someone with chatting. Casting Charm as cantrip should work.

Thanks!

For me it helps discussing with your tribe of gamers what kind of game you want, before you start it.

There will probably be several different answers for this and it might take a while to agree upon something.

Another thing that helps me is to have an idea of a game, present it to the players and invite them to join in.

GM: The minotaur points its horns at you and charge!
Player: OMG! I want to Defy Danger with Dex, sidestepping his charge! *rolls 5* NOES!
GM: Your sidestep was way to slow! The minotaur crashes into you with its mighty horns! You are hit for 7 damage and you fly through the room! The minotaur roars in triumph.

Minotaur weapons:
Halberd D8+1, close, reach.
+Horns 2d4+1, hand, piercing 1, forceful. Activated by player's miss.

Could work?