In the time when monarchs - dictators - like Henry VIII ruled, esp when they started to go off their rockers, seeming richer / cleverer / more attractive was very very ill-advised, so aristocrats tended not to flaunt their wealth and to use it purely as a means of ingratiating themselves with the monarch rather than rivalling them in any way.
If you take land ownrship as a measure of real wealth, then some of the aristocratic families of northern england and east anglia would give the monarch a run for their money -oops no pun intended.
Earlier in the middle ages, Jewish merchants lent huge amounts to cash-strapped kings, who masked their reluctance to pay up on the terms agreed by inciting pogroms and expelling all Jews from england.
Yet again in the early 1800's the Prince Regent's / Ki g George IV's spendthrift ways were only brought under control because Parliament refused to give him money - something they were able to do because political processes had developed beyond dictatorship and towards parliamentary democracy.