Henry Kissinger has a heavy German accent that didn't prevent him from becoming one of the most influential American politicians of the 20th century.
My gf's mother told me that joke back in the day, with a very heavy South American accent, but it still worked, maybe a little better because she said "Kissin-gher".
I saw Henry himself just a few years ago, right before Covid, in a NYC restaurant. He's extremely old, but he seemed very together.
You might call him a "statesman", but he wasn't precisely a politician. Also, the post WWII/Cold War era opened the door, so to speak, to a large number of displaced Europeans, scholars, to give advice about East and Middle European issues, advanced science, etc. Zbigniew Brzezinski, Werner von Braun also come to mind.