There are several good Lowlands from which to choose; the rub is that many of them are from distilleries that are now silent and there are few left in the region, so in this case, geography is your adversary.
By tradition, and this is not uniformly true, Lowlanders are unpeated and in some cases are triple distilled (rather than the standard double) resulting in a dram that is lighter and less rich than you are describing.
That said, Auchentoshan Three Wood is worth trying. I get toffee and caramel from Auchentoshan 12 and 18. I would also keep an eye out for Glenkinchie Distiller's Edition, Signatory's unchillfiltered bottling of 16-year Bladnoch, and a John McDougall bottling of Bladnoch.