I understand why you would say that, but that would be quite a big ask. There are only six bills, of which the design applies to 19 countries, and of which the United Kingdom is not a member. The bills feature fictitious imagery (at the time at least, as Tom Scott shows [1]) in order to avoid national bias.

For those curious as to what could have been, many of the 44 design proposals from 1996 [2] did feature historical figures.

1. https://youtu.be/S9E1wsxOSzM

2. http://www.coinsworld.eu/info/euro-banknotes-designs/

The € bank notes do not have historical figures on them. Only the coins have historical or royal figures on them depending on the country that minted them.

If the UK had the euro they could put his face on their coins, but well... that's never going to happen anymore.

Perhaps all paper tape should be printed with regularly spaced perpendicular divider lines, too.