I think you should try the CH/CHPs, and if you are looking for an unpadded then the HM. The PL has relatively tall cups, and I think it will gape at the top and outside edge. It also has very narrow wires. The S and SM are slightly less tell and fractionally less narrow, but I reckon still too tall and narrow for you.
There is a possibility that even the CHP might be a bit narrow - I think you will probably need some serious scooping to make them work initially however I know of at least one wide rooted bra lover who adores them
I'm also going to contradict Bravissimo slightly, in that I don't think they should be ruling out Curvy Kate entirely, nor masquerade really. I don't think the unpadded CKs will work, but CK do some balconette/half cut type bras which I think might work as they are good for wide breasts. They are relatively shallow but I find that they suit a lot of people who like the Patsy. However, Bravissimo doesn't carry the full range. CK run loose in the band, you'll almost certainly want a 30 and probably a FF or even a G cup
carmen longline
ritzy
tease me
If these work, other discontinued ones which still float about are entice, thrill me and Fleurty.
I'm also not convinced Masquerade wouldn't work sometimes. I have tried a fair few Masquerade balconettes, and they were far too wide for me and sort of pushed my boobs apart. Which is why they might work for you (I'm narrow rooted, close set, borderline full on top/tall roots).
For example
angie
rhea
celene
Not saying any of these will definitely work, but I'm not sure these brands should be ruled out without trying IYSWIM?
Another Cleo which might be worth a shot is the Maddie - it runs small so you might need to size up, but it's a smooth balconette. And just to throw a spanner in re the Deco - do you know there is a Freya Deco Half cup? It only goes up to an F or FF, but might be worth a look.