Gnoll

+2 Str, +1 Dex
30ft Base Movement Speed.
Darkvision 60ft.
Bite. You have a natural bite attack that deals 1d4 + Strength piercing damage.
Hunter. You gain Proficiency in Survival.
Savagery. You gain a bonus damage die on a critical hit. If you drop an opponent to 0 hp, you can immediately move 15 feet.
Hardy. You have advantage against disease.
Tireless. You have advantage on Saves against Exhaustion when Forced Marching or Extended Labor.
Languages: Gnoll

After reading the suggested background for why Gnolls exist in the D&D world, I could see a great need to give a new background for the Gnoll should it be used as a player character. Simply calling them Hyena-people would not be enough. I propose either create a new story behind the race or remove them as a playable option.

Proposal: the gnolls are portrayed as spawns of Yeenoghu in D&D lore. A simple adjustment would be that the gnolls are cousins of the lupines, factions of which are often tainted by worship of Yeenoghu and demonic forces, causing them to form into the ravenous, warlike gnolls presented in Volo’s Guide to Monsters and the Monster Manual. World of Warcraft’s Gnolls might work as another inspiration.

They are disorganized, chaotic, prone to raiding, dimwitted, fierce, and tribal.