Thanks to all for the feedback. I think I am just going to have to try many on to find the perfect fit.
bj1111: you are right, it seems to be the holy grail! I will keep in mind your brand recommendations as well.
Atlantia: I will have to look at Kohl's. I am normally not a Kohl's shopper but I took a peek online and found several potential options. Thanks for the tip.
Jyoti: thanks for the tip to try a place with suiting separates, and thanks very much also for the list of things to look out for. That is what I was looking for!
Suz: excellent advice, as usual. I never thought to try on ANY blazer for fit, then narrow down by color. Thanks for the tip. It will be helpful as I embark on this search. Thanks for the ShopStyle link, browsing now!
Day Vies: you are the 2nd person to mention Kohl's so I think a visit is in order!
A follow up question: what is the more modern cut / stance for a black blazer? One button or more? Usually the longer boyfriend styles don't work on my body.
It will take some trial and error, but I think I need to do what Day Vies suggested: focus on finding one that is somewhat cropped or hits just at the hip (longer looks frumpier and less flattering on me), nips in at the waist (key), etc.
I'm sure I will find what I'm looking for - somewhere!
Thanks again!