Here is their Approximate Value from PFR:
- Andersen: 97 career AV, top season 7 AV, top 5 seasons 29 AV, 24/25 seasons with positive AV - I'm not sure if PKs are given credit for being strong at kickoffs in AV; not sure where to confirm that, but Andersen was very strong at that
- Hester: 57 career AV, top season 14 AV, top 5 seasons 42 AV, 9/11 seasons with positive AV
- Guy: 44 career AV, top season 4 AV, top 5 seasons 20 AV, 14/14 seasons with positive AV
Hester had the strongest peak, but Andersen delivered positive value for nearly 3 times as long. Different people will judge that differently; I think Andersen clearly delivered more value.