What is the perfect Class for Connor Kenway aka Ratohnhakéton

Dunno about Connor Kenway specifically but I think Rogue + Fighter works the best- You get the parkour, mobility, and silver tongue from Rogue as well as the increased HP and martial skill from Fighter. It's what i'm playing now and it's pretty fun.

He mostly good with the bow and arrow also hatchets even snares, poison darts

then you're gonna want to remove fighter and add ranger levels

Yep

rouge + monk multiclass

Mine is Rogue+Ranger+Druid Multiclass because he's a Native American that joins the Brotherhood of Assassins. My made-up feature is he can speak Kanien'kehá:kan, Nature Adaptation - He has an advantage in Stealth, Athletics, and Acrobatics if he's in a Forest based place or places with Trees. Assassin- He is Proficient at Rapiers, shortswords, longswords, Heavy, Finesse, or Versatile weapons, firearms, Stealth, Acrobatics, and Athletics. Favored Enemy- Ruffians, Corrupted Rulers or leaders, and The Templars. Native Born- He is Proficient at Handaxes and Bows. Hidden Blade- He equips a Double Pivoting Hidden Blade for Combat and Stealth kills