Is Wladimir Klitschko a more accomplished heavyweight than Mike Tyson?

I will withhold my opinion until I give out the BA. While Mike Tyson was the most explosive and entertaining heavyweight since Ali when he came out on the scene, a string of title victories and then his subsequent defeat to mediocre fighter Buster Douglas. Wladimir Klitschko is an Olympic Gold medalist and an accomplished heavyweight champ just like Tyson although he is not exciting and seems to get only respect in the European boxing community. He was KO'd by 2 mediocre opponents, but has dominated the division for awhile now. He has defeated several top contenders including Eddie Chambers and he dominates them. He is always in shape and never comes in disappointing. While I feel Wladimir lacks the charisma and him being non-American, I think he is overlooked. Tyson is constantly seen on top 20 heavyweight lists even top 10, but I ask, who is the more accomplished heavyweight? Not necessarily the better fighter (if you wanna answer that by all means), but who do you think has contributed more and performed better for the sport? Peaceful debates, yall take care!