I can eliminate Frances Williams only because I've had it. It arrived with Sum and Substance and Mississippi Delta even though I mentioned I really prefer the small or mini hostas. This one is a giant.
Try this website - Mickfield Hostas in England - they have the England national collection of hostas and this webpage lets you search by broad characteristics. I've visited their nursery several times and plant to continue going; I love hostas and have a large collection. Whatever yours is, it's very attractive and I would love to have it here!