What flowers have you found the scent of to be offensive?
Japanese privet (Ligustrum sinense)
Stapelia (carrion plant... so not a surprise)
Purple velvet (Gynura - whew, had to snip those off inside.)
One of the Wisterias (not sure which, most smell good)
Bradford pear (Pyrus calleryana, smells like a really dirty men's restroom at a gross gas station. Yeah, sometimes you just can't wait for the ladies room - LOL!)
Little white Daffodils. (They smell good outside, but cut & brought inside, will have you looking for whatever's gone rotten. Maybe they change as they age?)
I didn't find the right solution from the internet.