Feel free we love to talk crazy flavor combinations...get you some Taro TFA / FE I don't care which one you go for they're both the same profile not saying they're the extact same but both are very true to the flavor.
Looking at things that aren't sweet think of great additives to things like coconut it can lend a sweet or a unsweet note depending on who's you use. Sweet coconut or Capella's coconut both sweet but Coconut Fa more meaty and coconut milk LB both coconut without sweetness creates creaminess an additional layer.
Lemongrass FLV not a sweet flavor but can be influenced that a way...comes off somewhat savory with a bit of flora ( plant ) like " grass- like " just a note doesn't mean it taste like the green stuff in the yard just want to start jogging your taste buds for the taste you'll preceive the brain needs to know what it's tasting so it can translate and identify w/ this profile.
Tobaccos yes... these are helpful in well rounded low backnotes really boost flavor extremely well. Soho FA fanastic especially at low % but I can vape it all on it's own.
Glad to have someone interested in Flora and Florals welcome to da club
Edit : get Ylang Ylang too !!!! Nice intro to floral