That sounds like a perfect task for visualization tool like e.g. grafana: https://grafana.com/
Though if you insist on using LV for that, I'd recommend you to import all different data using "Read Delimited Spreadsheet VI" http://zone.ni.com/reference/en-XX/help/371361P-01/glang/read_delimited_spreadsheet/.
Then you should merge the data together into one-format array.
Having all the information in one array will allow you to perform whole variety of analysis.