OK
Here we go with a few famous Brits...
Charles Babbage.arguably the first computer.
John Napier, mathematician and inventor of the slide rule.
James Watt, steam power
James Dunlop, rubber tyres (tires for the US contingent)
Isaac Newton, mathematician, calculus and the laws of motion
Alexander Graham Bell, telephone.
James Hargreaves, spinning machines for making fabrics (Spinning Jenny)
Thomas Newcomen - atmospheric steam engine
Alexander Flemming, penicillin
Joseph Lister, antiseptics
Bertrand Russell, mathematician
Not to mention William Shakespeare, John Milton, Charles Lamb, William Wordsworth, Robert Burns and Charlie Chaplin.