IN NA simple there is no world level players except Kanak does why Eugene was best Americas player. On world level he just average player. Current world ranking doesn't mean something. Eugene ranking higher then many players much better then him.
I guess your not reading my English to understand,
in 2012 to 2015 where it was likely Eugene's prime, it was the very old world ranking system. So his ranking was not inflated and he was 50~65 then and have wins against many top 20 players, including world champ 2nd place Fang Bo. I counted over a dozen top 50 players that Eugene beat, from the likes of Japan, Germany, Singapore, China and Europe (TT big nations basically)
Eugene did deserve his spot around the WR50 mark, and I am now tending to agree with NL. You obviously haven't been watching much table tennis of 10 years ago to assume Eugene was not world level.
I would say, Eugene in his prime is still higher than Kanak at his best. Kanak's WR is inflated due to the new WTT world ranking - which was introduced 4 years ago only... Eugene was 34 years old, 4 years ago, and on the decline.
If Eugene had WTT new world ranking today, he would likely be inflated from 50~60 to 20~30.
If you don't understand how WR works 10 years ago, then, maybe it is best for you to go and research a bit and also check the historical data on how many famous players Eugene has beaten in his ITTF career (WTT didn't exist back then).
If any, Kanak is NA groomed, while Eugene is Chinese groom. But Eugene being the level he was in NA 10 years ago, did beat all those Chinese provincial players (and national b team players) that still reside in the USA today and his wins over top world players are a fact and can't be edited. In NA Eugene was basically undefeatable and only defeatable now and have many wins against other world level player, just a pity he is no longer in his 20s, so he can show you his world level (but there is youtube for that)