I'll let members make up their own minds. https://www.bbc.co.uk/news/magazine-29701767
Have you made up your mind? A BBC apologia and whitewashing of Churchill's crimes, which literally begins;
The UK is marking the 50th anniversary of the death of Winston Churchill. He is regarded by many as the greatest Briton ever, but for some he remains an intensely controversial figure.
"Many" regard him as the "greatest Briton ever", whilst only "some" regard him as a "controversial figure". Sounds perfectly balanced to me?

I have to say that the term, "controversial figure" is doing a lot of heavy lifting. If controversial is simply a euphemism for, "genocidal, white supremacist, working class hating bigoted drunkard and racist war criminal", then I agree that he was controversial. All of that is merely the printable things that Churchill's contemporaries said about him. The 10 "greatest controversies" that the BBC listed actually manages to miss out his "greatest controversies".
I look forward to the BBC article listing Stalin's "greatest controversies"

Anyway a less flattering view of Churchill's "greatest controversies"/war crimes below;
https://medium.com/@write_12958/the-crimes-of-winston-churchill-c5e3ecb229b3 The BBC article forgot quite a few that definitely should be in the top 10,
Kenya-
At least 150,000 men, women and children were forced into concentration camps. Children’s schools were shut by the British who branded them “training grounds for rebellion”. Rape, castration, cigarettes, electric shocks and fire all used by the British to torture the Kenyan people on Churchill’s watch. Afghanistan-
Churchill found his love for war during the time he spent in Afghanistan. While there he said “all who resist will be killed without quarter” because the Pashtuns need “recognise the superiority of race”. He believed the Pashtuns needed to be dealt with, he would reminisce in his writings about how he partook in the burning villages and peoples homes.
“We proceeded systematically, village by village, and we destroyed the houses, filled up the wells, blew down the towers, cut down the great shady trees, burned the crops and broke the reservoirs in punitive devastation.” — Churchill on how the British carried on in Afghanistan, and he was only too happy to be part of it.
Churchill would also write of how “every tribesman caught was speared or cut down at once”. Proud of the terror he helped inflict on the people of Afghanistan Churchill was well on the road to becoming a genocidal maniac. Those two "controversies" didn't even make the BBC list

The printable comments that I referred to above about Churchill are all from his contemporaries. A mixture of my grand-father, father and various uncles and aunties. I'm sure you can figure out the less printable ones.