I would genuinely love to be able to say Thatcher. But the more one examines her life, the more despicable she becomes.
For example, her supposedly strong stance on the Falklands was nothing of the sort. She wanted to leave well alone, saying "let the Argies have it" but was advised by her...
Tony Blair was head and shoulders above the rest in my lifetime. He led the country through the last few years of the greatest decade since the 60's and implemented countless policies to improve the UK and the lives of those living here.