The lesson
Start a case study with the customer's face filling the hero and two figures set directly on the photo, before any prose.
A full-width portrait of a smiling woman against white brick carries the Glossier wordmark and "How Ramp enabled Glossier to save 5 hours/week and easily integrate with NetSuite". Two figures sit on the photo: "5 hours" per week saved, and "6 weeks" from discovery to onboarding. A quote beginning "We were in disbelief." follows.
Do not copy the numbers; use only figures your customer will let you publish. Keep the portrait-plus-two-figures hero and a short quote right under it.