The Jodel 1050 fails on payload and speed, nice little machine though it is. The DR250 however ticks all the boxes. Payload about 400kg, but you get away with less fuel on an O-320 burning 27-30 l/hr at 120 knots.
DR400-180 and D140 Mousquetaire from the same stable are worthy contenders too. The D140 maybe a little slower, but will lift a massive payload.
If you,ve got a workshop and some time to spare, howabout building an RV-10 and really go places?