Brotato

I used Fisherman for this because he has the ability to reroll bait for 1 Coin evertime you reroll.
You will get +2 Harvesting for every Bait you have.
I reached 200 Harvesting on Round 12 using this Method

The Fisherman isn’t complicated to unlock, but it does require a little luck — you just have to get two baits in one run. Getting them is a minor matter of luck, but you’ll want to make sure you can actually survive the onslaught.