If not for the trees, the DB8e would be more than enough UHF capability. The panels can be adjusted to optimize the beam-width so that Queen Anne Hill, Capitol Hill and Tiger Mountain are all covered. Take a look at
https://www.antennasdirect.com/cmss_...s/DB8E-TDS.pdf With the panels set to about 20° to 30° off broadside, you get three strong forward lobes that can be aimed at the three main groups of signals north of your location.
For High-VHF (real CH-9, 11 & 13) the Y10713 is also on the large side, but not overkill if you have to contend with the trees.
You can certainly try the less expensive route suggested by teleview... if replacement of a balun (matching transformer) and/or a section of coax provides reliable reception, I'd hate to have talked you into spending hard earned $s that did not need to be.