Epic 7 features a selection of different Heroes to choose from each with their own unique abilities. Below is what we think are the best ones based on their category and also their tier.
Remember though that some heroes may be great if you want to clear the storyline but not so good for the Abyss feature, therefore it is advised that you focus on getting characters that have average overal competance in all the features. The answer then to the initial question is that there is no one best overall character.
Although you will not be dealing with opponents who are difficult to defeat there will be occassions when stronger bosses make an appearance and you will need a source of constant DPS to deal with them quickly.
Tier 1
Sez
Sez is a thief who is a very high damage dealer with good burst damage and also AoE damage.
Element: Ice
Skills: Dark Shadow, Encroach, Death Sentence
Hero Speciality: Ridiculous Answer
You may want to also consider Armin and Cecilia.
Tier 2
Iseria
Isera is a Ranger who has good damage. She also debuffs enemies.
Element: Earth
Skills: Refined Flower, Oathkeeper, Full Bloom
Hero Speciality: Unknown Call
You may want to also consider Elson and Armin.
Tier 3
Charlotte
Charlotte is a Knight that who has decent AoE damage and lots of CC.
Element: Fire
Skills: Dual Swords, Ground Slam, Vortex
Hero Speciality: In the Shadow of the Crown
You may want to also consider Purrgis and Cidd.
The best heroes in this category are those that have abilities to do AoE damage and bust damage as your opponents will usually be able to heal and buff themselves more than monsters in PvE. The ability to dodge attacks and debuff the enemies is also key here.
Tier 1
Destina
Destina is a Soul Weaver that heals and cleanses debuffs, she also has great sustain.
Element: Earth
Skills: Destina's Grace, Regen, Key to an Oath
Hero Speciality: Path of Light
You may want to also consider Martial Artist Ken and Armin.
Tier 2
Clarissa
Clarissa is a Warrior who is a decent damage dealer. She also has high DPS.
Element: Water
Skills: Harsh Lesson, Rage, Hysteric
Hero Speciality: Enforcer
You may want to also consider Ravi and Cidd.
Tier 3
Yuna
Yuna is a Ranger that does AoE damage. She also buffs the allies.
Element: Ice
Skills: Homing Laser, Meteor Cannon
Hero Speciality: Lovely Machinery
You may want to also consider Achates and Lots.
In this feature you will have to fight monsters whose difficulty will increase with each level so you are going to need sustain, damage mitigation and damage dealing heroes.
Tier 1
Ravi
Ravi is a Warrior who is a high damage dealer. He is also a good tank and can leech life from enemies.
Element: Fire
Skills: Slaughter, Demon's Blood, Devil Drive
Hero Speciality: Blood Burst
You may also want to consider Martial Artist Ken.
Tier 2
Krau
Krau is a Knight who is a good tank and a high damage dealer. He has a good burst damage and can also buff allies.
Element: Ice
Skills: Swordstorm, Charge, Summon Ziegfied
Hero Speciality: Aggressive Protector
You may also want to consider Cecilia and Karin.
Tier 3
Lots
Lots is a Soul Weaver that has decent heals and debuffs the enemies.
Element:
Skills: Holy Light, Regen, Serenity
Hero Speciality: Calm Darkness
You may also want to consider Destina and Sez.
We have questions and answers related to this topic which may also help you: