Apart from that, if you are a heavy rider there's always Bike Friday (with their heavy rider upgrade if necessary) and - if you are willing to spend a little more there are brands like Bernds, Samson and Pacy that do high quality folders that are suitable to heavy riders. All three are from Germany, so possibly a bit difficult to get hold of if you are from overseas but not impossible.

Regarding the Brompton I would not be too concerned if you are a bit (!) above their weight limit. You'll possibly suffer more/earlier wear of the rims and the rear hinge but probably not do any harm to the bike itself. Obviously no guarantees, but there are a couple of Brompton riders over that limit. Good thing is that you'll loose weight anyway when riding regularly.