Exactly. I have seen several attempts to do the same for Prime Ministers - check whether the top one is Attlee or Churchill / Thatcher, and you can more or less predict the rest of the sequence without reading on.
The best remedy to this conundrum I've found was when reading a ranking of Australian Prime Ministers that used the criteria of "How successful were they in achieving their goals?" which essentially eliminated the left-right divide. I recall the ranking placed Fraser at No.10, with Whitlam and No.11, reasoning that Whitlam had twice as many successes as Fraser, but also twice as many failures (not counting the Constitutional Crisis), and it was merely the fact that Fraser government for longer (8 years) that put him in front, barely.
I also recall reading somewhere that National Foci do increase with technology. Had anyone else read that or am I imagining things?