Bob, never been but in a somewhat similar situation.
Planning a fairly quick trip for August and haven't finalized all of the plans yet.
Mainly centered around Geiranger but am flying into and out of Alesund and renting a car there.
Debating where to spend our last night, possible we could stay a night in Alesund, as our flight out is at 10 AM.
Aksla viewpoint is an obvious one, seems like could be really nice for sunset. You can walk up, take a touristy looking open bus that looks fun or even drive your own rental car to the top. A café is at the top.
I am thinking of just driving there after picking up the car, since I think we will head to Geiranger right after our international flight since we get in early enough to do so and not sure we will return to town other than to the airport.
Definitely curious if the downtown is good for walking around, shopping, etc... enough to occupy one's interests.
The harbor front does look nice, there is an aquarium and a museum but would not be something of much interest for me personally.
I am I think a little more looking for dramatic vistas and impressive places personally and willing to drive to see them than you may be.
If you are renting a car I think you have other options though many of them are not too close I think.
The lighthouse is close, not much else that I was interested in is though.
The island Runde which you can drive to in about 2hrs has nesting birds like puffins.
They also have wildlife safari boat rides that go around the island to spot the birds and also seals.
This cool spot with a swing over the fjord is a 2 hr drive.
https://www.visitnorway.com/media/news-from-norway/is-this-the-worlds-most-stunning-swing/
Sunnmore alps should have various places to go/see/do even without hiking; kind of in the same area as that swing.
Strandafjellet Ski Center has a really cool looking cable car/gondola to the peak that operates I think all year and looks very scenic at the top, that looks like a 90 minute drive away
Trollstigen road is a little over 2 hour drive
Atlantic Ocean Road drive is about 3 hours
Geiranger is about 2 hr., 30 minute drive
Andalsnes is a little under 2 hours ; you mention not big into hiking but so the Romsdalseggen Ridge is likely out of the question but the steep stairs up to the amazing looking viewpoint of Rampestreken maybe something you can do?
Trollstigen is close to Andalsnes
Loen is a little under 3 hours, there is a gondola/lift there, as well as 2 different Glacier areas which would be cool to see and a pretty glacier fed lake.
There is a boat trip that goes from Alesund to fjord and stops for lunch for a hotel there before returning.
Seems kind of laid back and luxurious, see below review and description.
https://www.tripadvisor.com/Attraction_Review-g190504-d3505174-Reviews-Boat_trip_Hjorundfjord_incl_lunch_at_Hotel_Union_Oye-Alesund_More_og_Romsdal_West.html
Kayaking seems to be very popular and can be done out of Alesund.
Let me know what else you find, I only have 5 nights in Norway and planning the first 3 in Geiranger and a little undecided on the last 2. Hopefully I am overlooking something amazing.