Those are pretty solid but big options. I'd actually be totally happy with lower power Type C options though. A regular phone charger actually puts out enough juice for the Chromebook. Definitely going to stick with the Anker though, I've heard way too many horror stories to trust a no-name Chinese brand with stuff that can actually explode.
"Look at my car. Do you think that was bought with the earnest love of geeks?" - HaemishM
I had an Anker USB charger (circa 2014) literally melt, it is still a cheap Chinese brand. Luckily I had to move the iPad it was charging (our POS) and found the problem before it burned down the library (it was next to a shelf full of books).
I've begun doing without rather than relying on dangerous garbage (dad was a fire fighter and is appalled at the amount of cheap fire hazards people are loading their homes with).
At the least, never leave any of these things plugged in unattended. Inspect your fire extinguishers regularly and drill on their usage (that info needs to be in the subconscious when a fire breaks out!).