A TB20 can operate out of 500m tarmac at zero wind and MTOW. It's got loads of power. At Scilly Isles, one is airborne by the midpoint of the runway.
The issue with grass is much more that people with decent planes prefer to avoid it, rather than runway length. In the long run, one spends more money on gas seals and such.
There isn't a 4-seater which will take 4 present-day-sized adults and full fuel, anyway
But a TB20 gets closer than anything in that class. Among current model machines, the SR22 is the only comparison and I would choose a TB20 even then.