Weigela can be iffy here in z5, so not sure I would recommend them to you, for the front yard esp.

Forsythia is a bit of a one-hit wonder, as it's only a standout in spring..leaving the rose, which is not yet rated by the ARS, but it looks to be an outstanding plant.

I just put in some shrub roses in my front garden (pink Knockouts). They're real show-stoppers and still look good so far, very little mildew/black spot and loads of blue-green foliage (but no fall color) and even a few blooms.

How do you like your QF? I have one that is still small, in part shade. I have read that full sun is okay though, and that the fall color is best in full sun. I really like the red stems.

You must have Weigela that aren't suited for zone 5. I have multiple cultivars that do fine in my yard. Pink Poppet is actually ok to zone 3.

The fiesta forsythia will have the spring show, but the foilage is the biggest bang for the buck. Will show well with the other plants. But I know there has to be something else out there with a little more interest..ie fall color.

I like the idea of the long white rose bloom but the foilage will look "blendy" with the other plants. Knockouts are a hit or miss in zone 4.

My quickfires were planted mid-summer so they didn't establish all that well this year because of an extremely dry August...should bounce back next spring. I have them in full sun and I didn't notice much of a fall color. I don't think they are really supposed to have any consistent fall color anyhow. I do like that the flowers hang on, they dimension to the plant.