Cleric/Sorcerer Multiclass

Metamagic Guide

Subtle Spell is incredibly powerful… You can avoid problems with Silence (and can do cool things like Knock inside a Silence area)…. Prevents spells from being Counterspelled

If the subtle spell only has verbal and somatic components, it cannot be countered.

Divine Soul Sorcerer has access to subtle meta magic, Knock, and Silence (Law or Neutrality are probably best)

https://rpgbot.net/dnd5/characters/classes/sorcerer/subclasses/divine-soul/ https://rpgbot.net/dnd5/characters/classes/cleric/subclasses/order/

https://www.youtube.com/watch?v=Sxsjl9CEUEI