Hey so I need unique class ideas pretty please [OC]

So basically I’m DM’ing a custom built Shangri la frontier campaign and came up with an idea for unique classes, such as the two I have being blacksmith giving the player the ability to fully craft their own weapons and such with specialized skills, and executioner giving a unique skill called follow through making it so as long as a counter attack does less than 50% hp in a swing the players attack will still hit, I also need stuff like disadvantages for those classes, for executioner I kinda have one being that weapons without flamboyancy (can’t think of a better word) does half damage but a cool weapon does 1.5 times damage any ideas would be appreciated (and if anyone knows an already made rpg style stat system for dnd play id be rather appreciative if you’d tell me about it)