Ok, I’ve caught up a little. You went from ‘Great deal of time at the resort, not sure how much time in the parks’ to ‘All four parks in four days, focused on thrill rides.’ If you truly focus on thrill rides and not the full parks that should leave a good amount of time at the resorts, but keeping the focus on parks and thrill rides I’d recommend staying at an Epcot resort.
The Epcot resort area is great. For starters you have easy access to both Epcot and the Studios. Cosmic Rewind at Epcot may now have my top spot for rides at WDW, although Flight of Passage at AK is neck and neck! Epcot also has Remy, Test Track, Soarin’, great food options, and even for a 16 year old the World Showcase can be fun. As for the Studios, you’ve got Rock n Roller Coaster and Tower of Terror, the Star Wars attractions, Slinky Dog (not the most thrilling coaster but fun), and some good father son rivalry fun on Midway Mania. In addition to that kind of park access the Epcot resort area is fun to explore, being able to explore around the Epcot resorts, a fun atmosphere, some food options, even being able to see some Epcot fireworks if not in the park. I know you’ll have a car, which provides great flexibility, but being able to leave the car (something of a real world intrusion) in the parking lot as much as possible is nice, IMHO. That said, driving to AK for your time there is super convenient/efficient! The only challenge of an Epcot resort is the MK. Parking there is less convenient, or you could use the bus for that one day. The busses are kind of cool, on a limited basis, at least for us.
As for Epcot resorts, Beach Club is our favorite. I know you said pool isn’t important, but if any pool is worth spending some time at it is Stormalong Bay! Swan and Dolphin are also very nice, for a slightly cheaper option. Boardwalk and Riviera are also options.
There are some nice moderate resorts out there. However, for a special trip like this I think immersing yourself in an Epcot (or MK) resort just adds to the Magic. The less time you spend driving a car or riding a bus the more Magical, IMHO. Values aren’t our thing so I can’t advise there, but with money not being a driver I wouldn’t recommend them.
Just a thought, have you considered a DVC villa? You can reserve through Disney, or there is the DVC rent/trade board. Renting a 1Br Villa from a member (there is midweek availability at both Board Walk Villas and Riviera on the Skyliner, which is cool), for a similar price as a standard room through Disney, would give you more space and some privacy. Just a thought.
Have fun planning, and have a great trip!