The only Eucalyptus I have that I know did NOT croak is a spinning wheel.

Cascadians has the right plant. Try to find Eucalyptus perriniana. In my humble opinion, it is superior in about every way to a Eucalyptus cinerea (silver dollar). Here is a pic of mine, and believe me, if you like silver round foliage, you're in luck.

I should add that the larger of the round juvenile leaves are the size of my hand. Here are a couple more pics.

This species is one of, if not the most adapted to our arctic blasts of any Eucalyptus that we can grow here. In the first pic, the light green looking areas in the crown are flower buds. It get's covered with white flowers in spring (sporadically early winter on) and hummingbirds go crazy for them.

This species was re-seeding on one Seattle site - before being hammered by the 1990 winter, as were most gums in this area.

Some nice large ones can be seen in two spots near one another in downtown Vashon. I believe I've heard some mutterings that these are probably pre-1990. A small one I have not seen on Bainbridge Island is claimed to date from the 1950s!

There is one right off of 520 on the north side, east of Montlake Blvd. I took a look at that one personally in spring after the 1990 nightmare, and it had leaf burn, but no dieback on the branch tips that I could see. I like the fact it has the look of your standard large mature Euc, but is not too large for the garden. Very nice. Maybe the one of the better looking Eucalyptus species if you take flowers and bark out of the equation, though those still look nice too.

I've seen that specimen many times. It is the tallest one of 8 different examples listed by A.L. Jacobson in Trees of Seattle - Second Edition:

"Arboretum: #502-66 is N of N-bound SR-520 offramp is 45' x 2' 11 3/4" (4-trunked)"

The "66" indicates the tree was acquired during that year.

I've got a glaucescens, a subcrenulata and a neglecta that all survived here at Lake Tapps. The only one I've had that died is a cinerea. I had a low of 12 or 13F, over a week of almost solid subfreezing temps and also 40-50mph dessicating winds while it was below freezing.

Some of the leaves turned partially brown on the subcrenulata but it's already sprouting new growth. The other 2 had a few minor spots on some leaves but otherwise unscathed.

Neglecta and glaucescens are so tough that I planted a couple at my parents place in Ogden, Utah last spring. Both survived the winter, but with browning of the leaves. Temps got to 5F out there including countless days of below freezing day and night.

Yes: Single digits is when you start to see the men separated from the boys. I've had multiple species including E. glaucescens effectively destroyed after only a short time on Camano Island - and I'm not talking about starting with this past winter, which also burned up multiple other kinds of plants that would not have been hurt in much of Seattle and vicinity.

Gums also vary rather widely in hardiness even between related seedlings. So, an example of a species freezing down may not show that another example would not persist on the same site.

Except on Camano they've all failed or been hurt at this point. The upper part of high altitude origin E. gunnii snapped off in the heavy snow we had last(?) winter, then this winter the leaves scorched.

I can take a hint.