CargoTrike
Actually, 4x4s are much more likely to have rollover accidents than normal cars.
There's not a very high incidence of rollovers, but when it happens it tends to cause very serious injuries / fatalities.
(I've been reading the EU and US safety assessments).
Recent 4x4s have electronic systems which help avoid too much body roll - and they help avoid rollovers - but they don't avoid the 'tripped rollover', which is where the tyre hit the kerb sideways and the vehicle is flipped over and rolls.
So a 5-star 'traditional' car might actually be safer than a much higher-bodied 4x4.
Also not many 4x4s are actually 5-star rated for occupant safety - it's only the Volvos and the VS Touareg, I think. The discovery 3 is not as good as it should be.
I'd consider the Volvo XC90 because it's got what's effectively a roll-bar in the roof - if it does roll then the roof shouldn't buckle.
The XC90 and similar models are also kinder on any pedestrians you might happen to hit - the bonnet is lower and more curved, whereas with the more traditional straight-up-and-down 4x4 front end, a pedestrian is likely to get a broken hip and then maybe go under the car.
Apart from rollovers, blind spots are the other big safety issue for 4x4s. There's a pretty high incidence of "Honey I Reversed Over The Kids". Sensors, good mirrors and reversing cameras can help with this to some extent.