ksysguard
, and if you can put up with Qt applications on your system, using Mint's Qt5 settings tool, and you can afford the 250MB or so root disk space for all the Qt support libraries, you too can have a very good, fully customisable system monitor.sudo apt install ksysguard
There are only two things to consider. First, you will need to correctly set the Qt5 settings from the Mint menu, and second, you need to be able to afford the extra 250MB or so disk space for the Qt support libraries it needs to pull in, but it does work 100%, just add a new tab and add all the sensors that the Linux kernel can throw at you.
Happy times looking at your replacement system monitor.