I've just got done climbing out of silver on my smurf so these are the best options I've seen
Top: Darius, Cami or Maokai
JG: Sejuani, Khazix, Xin
Mid: Fizz, Zed, Taliyah
Bot: Vayne, Varus, Caitlyn
Support: Thresh, Braum, Lulu
The amount of times I've seen people trying to fight Darius level 1 is outstanding but at the end of the day play who you want to, keep in mind this is a video game and your main priority is having fun, don't force yourself onto stuff you don't wanna do however if you wanna be efficient at what you wanna do, these are the most notable champions I've noticed. Mainly due to people not knowing how to play against them but you won't be able to abuse that fact in gold.
Let me know what you guys think or if you have any questions about build paths or w/e open to giving advice about anything really