Starwoman is listed as a mid-season IB, 25in. Probably blooms before most TBs so another IB would be more likely to bloom simultaneously. I have a hard time visualizing just one companion for a plicata. 2 or 3 would be my choice. If I had to stay at one it would be the dark shade of the plicata.
Some pictures show her as a red-purple (warm) and some as a blue-purple (cool). To have a really complimentary group may take trial and error. Unless someone has done that homework and shares what worked.

Another plicata in smokey raspberry (?)
Calligrapher - Smith'07, 25in. HM09
Cat's Hat - Spoon'04
Glam - Blyth'99, 24in.

Solids
End Zone - Stahly'02, 23in. (wine or red black)
King - Craig'09, 24in. (blue violet)
Midnight Sharp - (purple, RE)
Midsummer Night's Dream - Baumunk'97, AM03 (purple, RE)
Morning Smile - Craig'97 (white)
Morning Show - Ensminger, AM92 (burgundy)
Theda Clark - Nichols, 18in. AM93 (lavender)

And since I am a pink freak ......... (possible accent with grouping)
Londonderry - (cool pale pink)
Raspberry Blush - Hamblen'75, Sass Medal'81
Softly - Tasco'03 (pink, lavender beards)

Could not get a feel for what yellow (pale to gold) would combine well. Ditto with oranges.