A good fundraiser is a good networker. They're able to charismatically convey the vision of your organization to potential donors/investors. You should sense a lot of charisma and energy in your interviews with a potential fundraisers. A good fundraiser must also have an impeccable reputation for honesty and transparency so your company's reputation isn't tarnished. The person should a strong, extensive existing network among individuals who would make ideal candidates as donors/investors for your enterprise. Finally, the best fundraisers are usually the founder/CEO of the company raising funds since they should be unmatched in their passion for the entity they're raising funds for. I'm happy to hop on a call if I can help any further.