Best Tips For Ranking Up

I just wondered if you guys had any ideas on the best role to win a ranked game with, as well as champion Also just tips for that role and champion..... Leave me any thoughts below please, I'd love to rank up faster <3 I've tried just about everything and it feels like jungle is really what hits hardest, you need someone who ganks when you need it etc. But I also feel like jungle gets countered very hard in ranked due to wards and hungry mid laners....