Here are a few I have.
Perennials: Veronica spicata-blue, Coreopsis, Daylilies. I like plants with variegated foliage to so I put in 'Golden Tiara' Hosta and 'Fire and Ice' Hosta.
Annuals: I try different ones each year. I put in calendula, 'Topknot' Balsam, Malva, Lavatera, and 'Prairie Sun' Rudbeckia.
This year I will put in some penstemon and 'Moonbeam' Coreopsis. Marg

In order to answer your question I went to my computer and looked at pictures I took in July. These are what are blooming in my yard in mid July (from the 7th to 20th)...

siberian irises
tall bearded irises
campanulas (Cherry Bells, Elizabeth, Bernice, Kent, Peachleaf and Sarasoto to name a few)
lilies, pot, asiatic and LAs
peonies
coral bells are in full bloom
perennial potentilla
feverfew
daylilies
dianthus
gaillardia
rudbeckia
roses
creeping sedums
clematis
cactus
shasta daisy
sempervivum
hosta
jacob's ladder
monkshood
lychnis
lamium
Japanese iris
martagon lilies
masterwort
spiderwort
heliopsis
alliums, eg. drumstick
veronica, eg. Incada, Evelyn, spicata and Sunny Border Blue
veronicastrum virginicum (Culver's root)
delphiniums
monarda
phlox
astillbe
mother of thyme
nepata
sea holly

To ask me which perennials I love to see bloom. ALL!!!!

I do not plant annuals in my perennial beds. Annuals, here are only along the one edge in my vegetable garden and otherwise, only in containers around the walkways and on the deck.

Brenda

Perennials- late blooming peonies, some hostas, california poppies, dianthus and sweet william, and painted daisy to name a few

Annuals- I am never without loads of marigolds of all shapes, sizes and shades of orange, yellow, gold, white, cream, bi-colored and red. I also plant lots of them in with my vegies to keep bugs away and attract bees. The blooms last a long time and can be very dramatic. I also LOVE snapdragons in every shade and size as well. They are also very easy to keep looking good. The more you cut them, the more they bloom. All they ask for is water and soluable fert. once a month. Both marigolds and snaps are frost hardy and bloom here in Edmonton till well into October in a mild fall. They are easy to start from seed and are widely available as bedding plants. And can do well in part sun.
Hope this helps.

Ginny Garden

Thank-you to all that replied. I'll add whatever I don't have. Some that were suggested, I find bloom either earlier or later in my gardens than the time I want. Could be just my location, sun/shade etc that makes the difference. Thanks for your imput--I appreciate it.

When I looked back through my pictures I realized that mid July is a hit or miss bloom time for me. 2 years ago I had a ton of asiatic lilies in full bloom, but last year things were late - so not as much color as I would like at that time. I think this year I will plant a few more annuals just to fill in the lag time between some of my perennials. In my garden, the best perennial bloomers for mid July were hardy roses, Tall Bearded Iris, gernanium Rozanne,and Astilbies. As for annuals I had Dahlias that were started indoors, and Spotlight Rudbeckia that was also started indoors.