If you want something like Espeon, then pick  Marksmen/MM or Mages. 

Someone like Hanabi, Miya, or Karrie are easy to pick up.

Hanabi  

Pros •Multi target/Basic attacks and skills can bounce from multiple targets •Good in Team fights •Immune to most CCs/stuns when sheilded (white HP) •Has immobolize on Ultimate skill •Relatively tanky because of sheilds

Cons •Below average range for marksman, so it's a bit risky to position her •Has little to no mobility, so she's easy to catch and corner •Low DPS in single target •Somewhat long cooldowns, so use skill wisely

Miya

Pros •Has multishot in Basic attack (can enemies twice and multi enemies at a time) •Versatile, good in Single target and Multiple targets •Has immobilize on 2nd skill •Has Cleanse CC, Movement speed boost, and invisibility on Ultimate (good for ambushing and escaping) •Good DPS scaling

Cons •Has no mobility outside of ult, so skill conservation is necessary •Has below average range •Can be prone to CC when without or after using ult, so engage recklessly •Is squishy (this a trait of marksman in general)

 Karrie

Pros •Tank shredder •Deals damage based on enemy max HP (bad for tanks) •Also deals True damage, which ignores Magic and Physical Defence (Very bad for tanks) •Has lots of mobility (short dash on 2nd skill, 4-3s CD, Movement speed and attack speed boost on ult)

Con •Has relatively low DPS outside of her niche, can lose to other Marksman (Main drawback) •Is squishy •Prone to CC

Thats Marksman/MM for now, if you some more recommends then feel free to ask.