White Bordeaux is a challenge in general because they tend to be expensive and as you’ve observed there aren’t large numbers produced so they are far harder to find with age on them compared to their red compatriots. I’d say the ones you listed are all good and some more reasonably priced ones.
The only one you listed I think that is well known for very long term aging is the Domaine de Chevalier. It drinks well young but has a reputation for being terrific with 25-40 years on them. As an example, I tasted the 2001 at 17 years old and it drank like it was bottled six months previously.
de Fieuzal I like a lot and buy it and think they mature more quickly than Dom de Chevalier. I’ve had terrific ones 8-12 years old but none older than that. Some critics think they’ve done well with multi-decade aging at least for past vintages.
Carbonneiux seems to be a pretty reliable mid-level and I usually buy one or two bottles a year but wouldn’t give up valuable space in my cellar for long term aging. I’ve had a few that got pretty interesting with 10-12 years on them.
The other two may get interesting with age but I don’t intentionally age them and drink most of them relatively young.
BTW, one terrific substitute is the DeLille chaleur blanc from Washington State, a Bordeaux blanc style blend. It’s really good for the price, about $40 now, and it ages surprisingly well. Tanzer did a vertical in 2020 that went back as far as the 1998 vintage and he found they aged beautifully. I doubt though they are 30-40 year wines but who knows.