Friesans arent generally going to be the top level dressage horses - and assume when you say 'best' that's what you mean.
There are various warmblood breeds that make good showjumpers and the dutch are certainly among many of the current top horses but I've never heard of the hanoverian being the sort of horse you'd choose for eventing - something with TB blood will always have more scope over the big wide fences and that's pretty much what you'll see in the UK - even at pony club level it will be a TB x with something like a welsh or connemara