Please give me a bulleted list of men's Roland Garros champions of the last 5 years.

Sure! Here's the list of men's Roland Garros champions of the last 5 years:
* 2022 - Rafael Nadal
* 2021 - Novak Djokovic
* 2020 - Rafael Nadal
* 2019 - Rafael Nadal
* 2018 - Rafael Nadal