If you can reach a 10th and barely play it, then you can play the left hand chords.
By emphasizing the low note and playing the inner notes with the least emphasis on the top of the 10th, it will work. The right hand only spans an octave as I recall.
I think rolling it really weakens the impact. If I just couldn't make the span period, then I'd
play the bass note then very quickly play the rest of the left hand chord as a solid group i.e. not rolled.
Ironically, leaving notes out of the left hand makes it harder, IMO, since then there is less for the hand to "hold on to". For instance, the first LH chord is F, C, and A flat (the 10th).
If you leave out the C played with the 2nd finger (making a 5th with the low F) then the hand has to span the entire distance with no "bridging" assistance. So the trick is to place your hand on the keys in a stretched position, then as you push down with your wrist and arms, your fingers will actually splay outward helping to reach the entire chord.
I have an average hand, and this is the method I use i.e. the splaying thing, which can only be done slowly, but then you have plenty of time to form these positions. Try it and see if it doesn't help.