Companion plants for Creeping Sedum
Creeping Sedum blooms from June through August. It wants full sun and low water. The 8 companion pairings below each state why the pairing works.
Taking over as Creeping Sedum finishes

Russian Sage
Shares full sun and low water; stands well above at 3.9 ft, a canopy to plant beneath; overlaps, then carries the display into early fall; both are strong pollinator plants.

Monkshood
Takes full sun to part sun and low to moderate water; overlaps, then carries the display into early fall; stands well above at 3.9 ft, a canopy to plant beneath; both offer pollinator forage.

Autumn Crocus
Shares full sun and low to moderate water; blooms in early fall as this one finishes; both offer pollinator forage, in different months; purple against yellow, for contrast.

Bidens
Shares full sun and low water; overlaps, then carries the display into mid fall; both are strong pollinator plants; taller at 12 in, for the layer behind it.
Blooming alongside

Creeping Phlox
Shares full sun and low water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; pink against yellow, for contrast.

Cosmos
Shares full sun and low water; stands well above at 3.3 ft, a canopy to plant beneath; both are strong pollinator plants.

Giant Allium
Shares full sun and low water; opens in late spring and overlaps into this one's season; both are strong pollinator plants; taller at 3 ft, for the layer behind it.

Bachelor's Button
Shares full sun and low water; opens in late spring and overlaps into this one's season; both are strong pollinator plants; taller at 2.3 ft, for the layer behind it.