We're only talking modern? I thought it was in history.
The tricky thing here is most people have pretty much next to zero awareness of history.
I mean, say what you will about the evils of colonialism or the Opium Wars. But the UK's legacy includes all the Commonwealth nations, Singapore, etc.... all of which have become quite free and prosperous in their own right (and Hong Kong until China flipped it once the UK handed it over.). Governance, institutions, railways... yes, colonial, but also left to the benefit of the conquered until ultimately handed over to self-rule. Of course, one person's "civilizing another people" is another person's "colonialist oppression"... but isn't that what the US attempted (and failed) to achieve in Afghanistan, really?
But to clean out the historical cobwebs a little, just take some of the old empires of Persia. Cyrus the Great was infamously benevolent. The guy even created the first known declaration of human rights. The UN has a translation of it on the wall of its headquarters.
https://www.nationalgeographic.com/culture/article/cyrus-the-great
There's also the Sasanian Empire in Persia. They granted full religious freedom and their own choices of government, and
they abolished chattel slavery (something the US took long to adopt, and something the US still doesn't completely adhere to by allowing minimum wage violations).
And in India there was Ashoka the Great of the Mauyran Empire. Though he started out ruthless, the horrors of the Kalinga War converted him to Buddhism and he renounced war, introduced a pan-Indian political identity, encouraged social piety in governance (technically the cosmic law of dhamma, famed for all those Vipassana meditators today), and upheld laws for the common people and not just the wealthy and nobility. One of the biggest do-gooder non-profits in the world is named after him.
There are plenty of good examples in history.