After seeing mrowwy's success with the Linksys USB3GIGV1 I grabbed one and it worked great - as expected.
Each time I post an update I'm going to just add it to my prior list so my entire list is always in my latest post. Descriptions are from the Amazon.com listing for these items. I have Amazon Prime, so pretty much any adapter I buy is going to come from Amazon.
Working:
A: Plugable USB 2.0 to 10/100/1000 Gigabit Ethernet LAN Wired Network Adapter for Windows, Mac, Chromebook, Linux/Unix (ASIX AX88178 Chipset)
A: Ableconn USB2E100B USB to 10/100 Fast Ethernet Adapter for Windows, Mac, Linux, ChromeBook, Surface Pro, and Specific Android Tablets (ASIX AX88772B Low Power) - USB Ethernet Network - USB to RJ45
A: Linksys USB 3.0 Ethernet Adapter, Works with MacBook Air, Chromebook, or Ultrabook (USB3GIG) [RTL8153 Chipset, marked USB3GIGV1 on the unit itself]
Not working:
A: Anker Unibody Aluminum USB 3.0 to RJ45 Gigabit Ethernet Adapter Supporting 10/100/1000 Mbps Ethernet [RTL8153 Chipset]
C: CableCreation Gold Plated USB 3.0 to RJ45 Gigabit Ethernet Adapter, No driver software required, Black Color
Bolded item is best unit so far. Gigabit and USB 3.0. Only thing that would make it better would be being USB C instead of USB A (so no OTG adapter or hub needed). Mrowwy says the "Pluggable USBC-E1000 ( AX88179 ) - C" works, so that will be the next purchase.
---------- Post added at 02:20 PM ---------- Previous post was at 01:27 PM ----------
Pluggable device seems solid, very light, quite happy with it; best part is no adapters.
Getting ~100Mbps down/20Mbps up on potential 285Mbps down/20Mbps up ( tested against my laptop to SpeedTest.net servers ).
Which I guess it is likely that the USB-C port is likely only 2.0 on speed for the Pixel.
Since USB 2.0 max speed is 480 Mbps I would think even if the Pixel were indeed USB 2.0 you'd still be able to match the speed you're seeing on your laptop.
With both the Plugable USB2-E1000 (USB A) and the Linksys USB3GIGV1 (USB A) I get around 113 Mbps down and around 12 Mbps up - but that's exact same as I get on a laptop on the same network. Although my network is Gigabit and the Ethernet interface to the cable modem is Gigabit (and both devices are connected at 1000 Mbps per the status lights), I think my broadband Internet is probably 100 Mbps service - so that's the bottleneck.
When I get a chance I'm going to look for some sort of client/server speed test tool that I can run isolated on the local network. Something like a server/daemon on my laptop and then a speed test client of some sort on the Pixel - and see how fast they can move data between each other.