No way .
Wanchalerm got destroyed by Youssef ( he quit lol ) when Wanchalerm was actually good .
Now that he can beat by KO mister overrated Dejrit what make you think he can beat Youssef ?
He can't even save himself from being crushed by a good 70 KG farang in Magnus Andersson .
Youssef isn't a good fighter at 70 KG , he is top 5 of the greatest striker at 70 KG in the world .
If anyone can beat Youssef it's gotta be Petchmorakot , Yodwicha , Superbon and Sittichai ( probably ) .
Jo Nattuwot/Yodkhunpol/Sorgraw/Yodsanklai/Buakaw can do a bit against Youssef but they will still lose and become stepping stone for Youssef resume .
Only way Youssef lose to non-Thai is if it's under Kickboxing rules ( Samy Sana can do well against him in Muay Thai or kickboxing but they are friend so won't happen ) .