Here are a few in no particular order. I'll do more later on. (Updated)
HI-01:
Kaniela Ing Undecided
ME-02: Jared Golden
MS-02 (my home district): Bennie Thompson
CA-49:
Douglas Applegate Mike Levin, I suppose
IL-03:
Marie Newman None
IA-01: Abby Finkenauer
NY-19: Jeff Beals
CA-48: Tony Zarkades
UT-04: Ben McAdams
NY-02: Liuba Grechen Shirley
AZ-02: Mary Matiella
AZ-09: Talia Fuentes
KS-04: James Thompson
KS-02: Paul Davis
SC-05:
Archie Parnell None
KS-03: Brent Welder
AR-02: Paul Spencer
VA-10:
Lindsey Davis Stover Jennifer Wexton
NM-02: Xochitl Torres Small
KY-06: Amy McGrath
WA-08: Jason Rittereiser
NC-09: Dan McCready
NJ-11: Mikie Sherill
NE-02: Kara Eastman (Thought I publicly endorsed her before that amazing primary result on this site, so...)
NH-01: Undecided, someone other than Levi Sanders lol.
NJ-02:
Tanzie Youngblood (I liked her name
) Jeff Van Drew
PA-17: Conor Lamb
OH-12 (Special): Danny O'Connor
AZ-08: Hiral Tipirneni
MN-08: Joe Radinovich
TX-32: Colin Allred
MT-AL: Kathleen Harris
PA-07: Susan Wild