@Zathrus, While I’m not sure, I think @zyairie may be linking this Hero Booklet which is an excel/google sheet which will do exactly what you’re after.
The spreadsheet in that Forum Post has all the heroes & their base stats/ abilities in it. Also has a bunch of pre-made filters so you can re-sort or filter by various categories such as the star rating, the colour/element, the family, the summon portal etc…
Then can get your average stats from that if you want
