My suggestion has nothing to do with breeds.
I don't know you at all well, and please forgive me if I sound brash -- it is not intended.
My breath caught when I saw the title of your post "Help us try to replace our best friend ..." (my emphasis)
You can.t. You won't. You honestly should *not* even try.
She was unique. She was ... simply ... Chloi. She was a completely un-comparable mix, not only of breeds, but of her own unique style and personality. Her breed (s) history truly had somewhat to do with her personality, but likely far less than you may know.
Trying to 'replace' a dog truly is often a mistake -- because Chloi was unique. Even *if* you had the exact same mixture of whatever breeds -- it would *not* be Chloi. And there would always be the inevitable comparisons. It's not fair to you and it's really not fair to the new dog. Because there will never *be* another Chloi.
If she had been mass produced -- it would have made her "less" somehow. Her uniqueness was part of her strength and part of what makes her so incredibly memorable.
Can I respectfully make a suggestion? Why not sit down with family members and start absolutely from ZERO.
Rather than make a list of Chloi's good points to try to find again -- approach it completely from a different angle.
1. Make a list of requirements you have/need in a dog now and for the next 20 years or so. Size, coat, color, temperament, energy level.
OR ... make a list of things that would be UN-acceptable. Perhaps the dog needs to be under a certain size ... or maybe at least a certain size.
What things do you want to do with a dog? Swimming, boating, sports? Or mostly companionship?
How much energy and personal time do you have to devote to a dog?
Are you interested in rescue? Or is a puppy practical for you (rearing a puppy *today* may be quite different from when Chloi was a puppy -- can you spare that kind of time agan, that kind of energy again, are you willing to expend the effort on the chewing stage?).
There are no *wrong* answers to any of these questions -- just what your individual needs are and your own preferences.
2. Then collect a few books -- or browse some websites regarding breeds or rescues. Simply do some open-ended looking to find the dog that uniquely needs you ... and the one *you* need.
Personally, I'm quite addicted to rescue. You can see none of my dogs are alike -- nor are any of them similar in age. We like it that way. But each has come to us needing *us*. That's our own personal requirement.
As I say -- there are no "wrong" answers -- only what works for you.
But you will honestly find your search far more fun and far more fulfilling if you allow Chloi to be unique -- and not try to find a dog like her.
My guess is -- she was very very special. I hope you can celebrate that ... and allow her to be as unique as she was, and thereby allow yourselves the privilege of finding a new, absolutely unique friend to be loved by and to love in return.
As I said -- as an American, I may seem brash, and I truly mean no disrespect at all. Your description of Chloi glows -- she must have been very very special.