The answer is a good copywriter. But it doesn't stop there. There's five skill groups that need to be fulfilled.

1. It starts with the copywriter because they will take care of the most primordial aspect of marketing: addressing your audience's pain.
2. Then comes the growth hacker, the automation specialist.
3. Marketing and sales go hand-in-hand and that's where your product evangelist shines.
4. Number 3 is often confused with product marketing, which will be the fourth gap you'll try to fill. Potentially your first MBA hire, this person is all about the 5 Ps (and more).
5. Finally, the team leader. This one's last because oftentimes one of the previous four will organically grow into this position and you can find a new hire to fill their previous position.