I wouldn't call 'Allegan Fog' streaked. More like misted (though mine has a few leaves which are showing large sections of solid green) and it's stable. Same with 'Korean Snow' Both are much whiter when they emerge.
'Allegan Fog' - end of June
'Korean Snow' - June 20
The truly streaked ones I have are:
'Ice Age Trail' - mid July photo. Not as streaky as it once was, but there is still some streaking in each leaf.
'Liberty Bell' - not stable at all. It had stabilized to 'Bell Ringer' before it even arrived. It's still a pretty hosta, but somewhat susceptible to slug damage. Photo June 20.
'Lakeside Mom' - June 28 is a lovely streaked plant which seems to be quite stable.
'OHS Streaker' - my garden name for a plant I was given when the Ontario Hosta Society toured my garden. So far it's doing very well. I don't know its heritage at all.
A streaked version of 'Pewterware' which was given to me by a friend (it sported in her garden).. I've had it several years and it's doing quite well.
'Royal Mouse Ears' - June 20. First year in my garden, but so far so good.
'Spilt Milk' - end of June. I've never really considered this one streaked. maybe because it doesn't have as much "milk" spilt on the leaves as some plants do.
'Stealth' June 20 is supposed to be streaked but it has nearly entirely stabilized to what?? So far I've not been able to find out if the stabilized form has a name.