I think a modern day Greener built by David and Richard would be as near to perfection as you could have or ever get.Peter Nelson,Dave Sinnerton, Tony White, John & Brian Wiseman (now there is a nugget)all spring to mind, but at what cost and timeframe? Answer= phenominal cost and when it is right it will be ready timeframe.
Which sends us back in time to a Dickson, Harkom, Woodward, or best of all a Beesley.IMHO