Anyone better than Sniper in hero killing? (For beginners)

Me and my friend just started playing dota2 from scratch. I chose windrunner and he chose sniper. He always gets to kill lots of heroes due to his long range and powerful ability.

I know that our skill is just the same as we play diff games and we always score similarly so its not really the skill.

In this regard Is there another hero like sniper that has a long range and a powerful shot for hero killing?

Thanks

You're problem is that Windrunner isn't a hard carry and Sniper is, but if your question is who has long range look at this: DoTA Attack Ranges

Long range with a high damage 1shot ability like Sniper. Or is sniper the only hero like that?

Enchantress, the longer the range, the harder she hits.

Try Drow Ranger next time or Skeleton King(Drow if you want range, Skeleton if prefer melee). Both of which have carry potential and both are beginner friendly.

Ursa, all u gotta do is get close and use his w and with fury swipes then they are deaad. Only problem is getting to the hero but he takes down heros really easy early and late game.

Zeus, high powered, low cd spells and the ability to killsteal your friend

Well, no that he is out Troll Warlord all you need is a stun, run up to them in melee with his passive and ulti your attack speed will slice through anything.

Thanks for the suggestions, ill check them out. If you hav more pls indicate them here

Viper. He has a huge slow, over time damage and also, the more you hit, the more damage you deal.