The PM so great we named some tea after him.
Charles Grey, 2nd Earl Grey KG PC
was one of the main architects of the 1832 Reform Act, despite stiff opposition from The Duke of Wellington
. Prior to the passing of the law, the parliamentary map had not been changed for centuries and some districts ("rotten boroughs") elected 2 MPs to Parliament even though no-one actually lived there. In addition to straightening out a rather corrupt and unfair system that could in part be blamed for the American Revolution he also presided the total abolition of slavery in the British Empire in 1833 and gave his name to the aromatic blend of tea
before retiring in 1834.
The fact that the man who very probably saved Britain from violent revolution and then basically sicced the entire might of the British Empire on the slave trade is now best remembered for the tea says a lot