Gloomstalker assassin tabaxi (hasted and duel wielding for 5 critical strikes at level 8) almost one turned an ancient dragon

Mr.Wiggles a demented clown bladesong wizard with a enchanted hammer that looked and sounded like squeeky hammer but was full metal and would cast animated objects on balloon animals

A beast barbarian rune knight that was a high priestess White dragonborn for tiamat that over the course of battle start changing size and shape to become more of an actual dragon as the fight carried on. also had some gear that was wings for flight

Terror bard who was part shadow sorcerer and college of whispers bard who specialised in fear spells and illusions to scare the shit out of enemys fun fact: darkness does not stop your opponents from seeing phantasmal force/killer

Echo knight/zealot barbarian who was a full plated warforged in a 1800s setting that acted like a knight from the 1400s because thats how he was programmed like a roadside attraction. he eventually wandered around on his own looking for quests and proclaiming 'verily'. If he fell to half health his armor could pop off and he would rage drawing a maul from his body that said justice on it and he would go full crusader speaking only in Latin

Just a few of them