As found in this thread New Chronological List of Hero Releases:
I just wanted to highlight the really excellent and thoughtful website from @Marik for hero information:
It is really well done and very useful! Thank you for creating this great resource for the community!!
thank you @Marik for this website, and thank you @VeryQuietly for re-sharing it! much appreciated!
That’s terrific, thank you 
It’s inspiring that so experienced players find my project helpful) I was away for a while and the website was outdated. I’ve fixed it and now it’s updated with all new heroes.
Will this resource be updated? This is a huge help for us players. Thanks Mark for doing this!