like malz?
tensai, i agree. talon, wukong, vayne, and riven seem similar to me. however, you go into the rest of the heroes and there isn't anyone with a close-the-gap, escape mechanism, and stun/hard CC (that i can think of) - that is, a true assassin character that can get in quick, slaughter the enemy fast, and get out quick 1v1. the closest is xin but he's a hardcore glass cannon and has no escape. that said, talon, wukong, vayne, and riven are built totally different since one's mana-based melee, one's tanky dps, one's ranged dps, and one's CDR assassin.