Categorising Historical Price Data (HPD) Quality

I’ve noticed that there is quite a lot of duplication in HPD(there are multiple nasdaq price data), I’ve noticed gaps due to -
1 - no data(bad quality - GOLD futures is missing multiple months worth of data in 2017&2018)
2 - low volume(especially on some pairs because the broker has low volume when better sources have no gaps)
3 - inferior data source

If you can give a rating/ranking(5stars/top) along with the source(CME, OANDA etc) that will be better.