I use a lot of TFA for supporting flavors... their Sweetener is the best I've tried; their Vanilla Swirl is A-MAY-ZING (it's the diketone-free version of their Vanilla Custard); their DX Bavarian is great for a richer note without diketones -- mixed with the Vanilla Swirl, it makes a real custard flavor.
Also, I find their Blueberry Extra a very authentic blueberry flavor, but it's very aggravating to work with; if you use too much, the flavor kinda disappears; I haven't yet found *just* the right percentage for it, but I think maybe about 8%-ish. TFA's Cherry Extract is by far the best cherry I've tried; not too sweet, not too tart, not medicinal nor maraschino-ish -- it's the Goldilocks of cherry flavors.
For a real cream flavor, I use Capella's Sweet Cream -- which is diketone-free, but so authentic, I also use it in food! It's a miracle in a low-fat diet!
Most of the other flavors that I use and like a lot are from Inawera. Their Shisha Strawberry is the basis of my ADV for the last 13 months, but I don't let the usual "you don't need much" guideline constrain me; I use it at about 15%-16%. If you like sweet fresh strawberries, it's absolutely delicious.
INW's Coffee Tobacco is a really interesting flavor; it's not sweet at all, and truly tastes like both black coffee, and tobacco. I use it in a mix I call "Smocha," with INW's Cappucino and Virginia Tobacco Absolute. That's a recipe I plan to tinker with a bit more; I also add chocolate, and have used TFA Dbl-choc Clear and Milk Choc, but I got some Molinberry Glamour Chocolate I plan to try in place of those. I also got some of INW's Dirty Neutral Base, and I thought I would try that, in place of the VA TA. I've heard that if you want a real tobacco vape, the DNB is great to add for authenticity.
Another INW I got as a sample and plan to try is the Lemon Cake. I'm told it tastes like lemon pound cake, which i like a lot. I might try using a bit of it with some of the TFA Blueberry Extra, to try and get to a "blueberry muffin" kind of flavor. INW's Biscuit flavor is good for a cake/pastry/cookie kind of taste, but VERY strong; it easily overpowers most fruit flavors, even at 1% -- I'm thinking it ought to be pre-mixed at 10%, and then use that premix at 1%!
Hope any of that may be helpful in your quest...
Andria