CLASS/SUB-CLASS/MISC. ABILITIES
Feat
Sharpshooter - Attacking at long range doesn't impose disdavantage; ranged attacks ignore half and three-quarters cover; Before you attack, you can choose to take a -5 to hit to gain +10 to damage.
Aarokocra
Flight - Flight speed of 50' - can fly almost endlessly, even flying while asleep
Talons - d4 for unarmed combat
Artificer
Magic Item Analysis - Know Identify and Detect Magic, and can cast them as rituals. Do not require material components.
Tool Expertise - Double any proficiencies with tools gained by this class.
Wondrous Invention - Create a magic item (see Artificer chart) at 2nd, 5th, 10th, 15th, and 20th.
Infuse Magic - Infuse non-magical items with one of your spells to be cast within 8 hours.
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Gunsmith
Master Smith - Gain proficiency with smith's tools and learn the Mending cantrip.
Thunder Cannon and Arcane Magazine
Outlander - Bounty Hunter
Wanderer - Can always recall the general layout of terrain, settlements, and other features. Able to forage enough food and water for five people a day.