@Stackoverflowed and me think the same
KingSoft is in my opinion the best, in terms of functionality, lightweight, and look and feel. kingsoftstore.com/download-office (I have 101 rep but I can't post an answer). – StackOverflowed
Kingsoft WPS Office Professional
As an office suite of desktop applications, WPS Office consists of a word processor—Writer, a spreadsheet program—Spreadsheets and a presentation program—Presentation. Compared with other office suites, WPS Office is regarded as one of the best office applications with user-friendly interfaces and excellent performance.
It works natively with MS Office, working with all the office formats such as .docx, .xlsx, etc. And the difference with WPS Office and say LibreOffice, is that while LibreOffice supports those formats, they are not the default. In Kingsoft by default it works with MS Office formats.
There is a free and a payed version of WPS Office - Standard (Free) and Professional (Paid - $70 at the time of writing)