Any suggestions are welcome. Seward, Kodiak Island, Homer, Fairbanks? Trying to narrow down what to do with a weeks time before the cruise.
If you don't go to Denali, then I'd cross Fairbanks off the list. I spent about a day in there when we visited Alaska, but wouldn't put it on my list of must sees, and doubt I would have even visited it if we weren't coming from Denali.
Seward is fun if you go on one of the day cruises. Typically you'll see orcas, glaciers calving (from Kenai Fjords NP), whales, and other interesting wildlife. I think we also visited the Alaska Sealife Center while we were there, and it was interesting
Homer is pretty popular. My wife's cousin lives there, and we stayed with her, so I didn't exactly have the tourist experience. I'd highly recommend that if you go there, you book a floatplane trip from Homer to Brooks Falls (Katmai NP), to watch the bears feasting on the salmon that are jumping the falls.
We didn't get to Kodiak Island, so I can't offer any thoughts, pro or con, on that as a destination.