Not sure I understand the question...
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tobacco" is not just one taste. What type of seed, where it is grown, rainfall amounts/ irrigation techniques, Ambient temperature, how it is harvested, how it is cured.... a lot of variables.
Now, maybe (?) what you might be interested in would be an aromatic tobacco with a top note. Sutliif Molto Dulce has vanilla, caramel and honey and is super sweet. Sutliff Cramy Butterscotch is also sweet. Cornell & Deihl Autumn Evening has a sweet maple top note. Just about anything from Lane will start a little sweet because of the amount of Virginia tobacco (which has a high natural sugar content), and then they add vanillin Lane 1-Q, or cherry in Lane Very Cherry.
Top notes include, but are not limited to vanilla, caramel, chocolate, maple, liquor, and fruits.
When looking at pipe tobaccos (I recommend pipesandcigars.com as they have detailed information on each selection), look for Virginia and or Cavendish tobacco based flavors as they tend to be milder and sweeter. You might want to avoid Latakia, Perique and Oriental/ Turkish tobaccos in the blend as they tend to be stronger.
Pipe tobaccos are rated Mild, Mild- Medium, Medium, Medium-Full and Full. It has been my experience that Mild tobaccos become tasteless extracts. Anything Medium and above might be too strong for what you are asking for, so filter to Mild-Medium, and maybe filter to Aromatic.
I don't know if any of this answers your question, so feel free to ask some more.
Just my opinions, worth what you paid for them.