Have just been assaulting my bottle of Provenance Mortlach. It is very bourbony and has a lot of vanilla. It is also decidely chewy and moreish. I wouldn't have just had one third of a bottle and then a large glass of water before I typed this otherwise.
The two bottlings are vastly different from each other so it is worth checking both out.
Obviously a rubbery taste appeals to you and David. I know this because David told me this when he was at his previous employer.
I like sherried whiskies myself but I do think they can be overdone. I have never met an excessively peaty or smoky whisky.
I know where to get the Provenance version of Mortlach if you are unable to get yourself.
As for the others, my notes aren't that articulate so on your own head be it.
Nice to meet someone who agrees with me on David's jokes.
(which is something people don't do when they hear David's jokes).
I had an OMC Port Ellen 1981 at Tomintoul whisky castle and it was truly fantastic. If you can afford it get. I didn't take detailed notes but it was fantastic. If you are familiar with Port Ellen then you will probably know what to expect.