I'd say a discovery.. If you can find a good one. I bought a v8 disco 1 as a stop-gap whilst building my defender, and i love it.
They're the same underneath as a defender/series, they just have a lid with slightly more curves. Very practical indeed, and it has to be said, a better driving position than a defender.
If you don't need that size, then a freelander 2 is also a very for car. Not as much clearance as a defender/ disco, but very capable with the right tyres. They used to use them at the eastnor castle 4x4 track for pulling out people who get stuck in range rover on experience days. They're built on a modified Ford Mondeo sub frame, which is a very good thing.
HTH