I would like CPU monitor that sits in the top righthand corner of the screen. Something that I can glance at without clicking anything. The ‘cooler’ the better.
Any recommendations?
Yes, Conky.
sudo apt-get install conky-all
sudo add-apt-repository ppa:mark-pcnetspec/conky-manager-pm9
sudo apt update
sudo apt-get install conky-manager
As far as how cool you want it to be... Draw a sketch or make a request... I can make you a reasonably cool one without breaking the cpu usage. 
This is my Azenis themed RC: EDIT- this is an entire RC, not just a small and simple CPU monitor. I have one of those, too. One comes with your conky-all installation, as well. Only, it is not as Cool Looking. But it could be...
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I was surprised to see Conky missing from the Zorin repo'.
Conky is in but the conky manager, as an independent project, has changed through several maintainers.
The mistake I made was searching the repo' while I was using Core on my desktop. 
Anyway, it installed without any problems, so now I will go and play with it.
Glad I came across this, any new updates such as an alternative to conky. I see on forums it does not work any longer unless I am mistaken. Tried using it on Zorin OS 16.2 Core Edition but no luck. Looking for something similar. Any recommendations?
Please see this post ehre: