Syrah is made in so many styles domestically - depends upon how much you want to explore.
If you have a Rocks District Syrah vs an Alban Syrah vs a Saxum Syrah, you’d be hard pressed to be able to see them all as simply ‘Syrah’.
If you like a riper, more fruit forward Syrah, go w Paso or Andremily or SQN; if you want something ‘meatier, go w Alban or Piedresassi or stuff from the Bassi vineyard in SLO; if you want something this is ‘different’ go w Rocks district
Cheers
I’m quite fond of the Syrahs from the Val d’Aosta. But not very plentiful. But classic aromatic alpine/aromatic Syrahs.
And Syrahs from the Priorat.
Tom
Sinor la Vallee makes crazy good Syrah from Bassi. That vineyard keeps churning out crazy good grapes.
Isole e Olena Collezione di Marchi ‘Eremo’ Syrah. Even in a supposedly weak vintage like 1994, it gave complexity, balance and also managed to speak of the place AND the grape.
I know you specifically excluded Australia, but I’ll still shout out praise for lesser known Aussie regions such as Grampians, which make wines closer to the Syrah (rather than Shiraz) style. In its own way as well, the Hunter Valley. Too many critics IMO are obsessed with the big warm South Australia regions like Barossa Valley and McLaren Vale.
Here are a handful which have been memorable for me over time.
Past:
Wells-era Copain (2007 Hawks Butte was especially memorable, haven’t actually had much from them since then)
Lagier Meredith
Halcon Alturas
Arcadian
Recent:
Holus Bolus
El Lugar
Tercero (given a proper decant…patience!)
Donelan makes great Syrah. WTSO has a good deal up too Premier Online Wine Shop | Wines Til Sold Out | wtso.com
Really good experiences with Duemani’s “Suisassi” from Tuscany, esp. 2019 which was top notch despite being a bit young
Christopher Tynan
I second Tynan. He makes a wonderful syrah — not over the top, more classic style. I had the 2012 earlier this week and it was fabulous
Should really check out (for California);
Terre et Sang
Andremily
Already mentioned, I’ll mention again:
Lagier Meredith
(now taken over by Pott, which I have yet to try)
Halcon
(now taken over by Pax, maybe too early to know what the style is going to be, but a great vineyard source)
Peay
To me, the best spot to grow Syrah outside Northern Rhône is probably Hawke’s Bay. Especially those from Gimblett Gravels have been very lovely, often quite NRS in style.
Also some serious Syrah is grown in Valais, Switzerland.
Cabot (had the 2016 Kimberly’s last night - everything I wanted it to be)
Lagier Meredith
Alban
Ojai
Piedrasassi
Dovecote
Paul Lato
Almost anything from Bien Nacido or Larner vineyards
Ignore Peay and Pax at your own peril!
Tensley Colson Canyon Syrah
Tensley Tensley Vineyard Syrah
Andrew Murray Watch Hill Syrah
Terre et Sang
Any Syrah from Alisos Canyon AVA
Love Santa Barbara County Syrah!!!
Craggy Range from NZ
Luca from ARG
Any number of wines from WA
From the way back machine Biggio Hamina Deux Vert from Oregon
Alisos! 
Many great wines above and Larry and Thomas did mentioned them, but there are few bottles I enjoy more than Piedrasassi Bien Nacido and Rim Rock. Outstanding Syrah for the price, but really just outstanding Syrah regardless of the price.