Salvias make good companions. Not the s. splendens that are bright red annuals, but pretty perennial salvias like salvia leucantha and many others, your choice.

I plant daylilies and true lilies together. Some bloom together, requiring careful color planning, some not, so it doesn't matter.

Roses make good companions, too.

Nell

Are you thinking annuals or perennials? And what height are the lilies you have?

FYI - the alyssum probably faded 'cause of heat. Lots of times transplants in full bloom look great at first. Heat does a number on them. If they manage to survive, they often put on a flush of bloom when days cool down in fall.

I planted some perennial Baby's Breath in front of some of the lilies, looked really nice.