hopIQ found 10 beers with the same clean and crisp character as Miller High Life. The Champagne of Beers since 1903, when Frederick Miller pitched the American good life as accessible to everyone. Brewed on barley malt with a corn-syrup adjunct, hopped with Pacific Northwest Galena in modified extract form (Miller's classic skunk-proofing trick for the clear bottle). 4.6% ABV, 7 IBU — the archetypal working-class American lager. Ranked by flavour match rather than popularity.
Closest match: Kona Longboard Island Lager — 84%. No twin in the catalogue yet.
4 countriesmatched across 56 flavour tagsbest match 84%

No beer in the catalogue yet — these come closest.
Close on what matters, with one thing they do differently.
Same idea, less detail — open a beer to see the full comparison.