How to beat larger opponent (20kg+)

I’ve done randori with a couple teachers who are larger than me and one guy who is about my kg but different body type (more stout and thick, i am more athletic and lean- same height)

I am finding that people my size, and particularly larger opponents might cause a problem.

I want to know how to handle same kg but different body types, and particularly bigger opponents.

Are there better moves to try? Or how would you even kuzushi such large opponents?

I am 183cm , 81-83kg depending on the day