From those you posted I've only heard JBL LSR305, Yamaha HS5, Adam F5 and Alesis Elevate 6 Active. Other than that I've heard 8 inch versions of Yamahas and Mackies and 5 and 8 inch versions of KRKs.
Based on all this I fully recommend buying the JBL LSR305, it's an incredible deal. In fact I have not found any significantly better small monitors until you get to Genelecs, which cost almost 3x as much here (and have less bass extension, but otherwise are obviously better at everything).
They are the cheapest natural sounding speakers I know of at the moment. That's a good thing, I don't believe in hyped speakers sounding better or in flat speakers sounding unnatural unless you listen at very high volumes. They're not completely flat, but imo the best you can get thanks to very good power-response. They also have controlled directivity which is something you definitely want in a small room - fewer reflections. A bass reflex in the back is a bit worse close to a wall than a bass reflex in the front, but you will always get boundary effects with a speaker close to a wall, even without a bass reflex. Plugging the bass reflex with an old t-shirt can help, but with such a small room you will *never* get accurate bass without measuring the frequency response and compensating for room modes (resonances that make bumps and holes in the frequency response often larger than 15 dB and that are very difficult to get rid of using room treatment). Room modes have way larger influence on what you hear than how flat the speaker's bass is, if it's not a completely shit speaker, especially in such a tiny room. Buying a cheap measuring mic is definitely something I recommend in the future if you don't want to always work on bass using headphones.
A bit about my perception of the others:
Alesis Elevate 6 Active: overall not very good, I think the M1 Active MK2 was the last good monitor from Alesis
Yamaha HS5: Relatively detailed, but very tinny, no bass, definitely not neutral. Have not heard the HS7, but HS8 is pretty bad as well - agressive mid-treble, lack of mids, inflated bass.
Adam F5: Detailed, no bass, too aggressive mid-treble (fatiguing to me), bad directivity (treble beaming), bad stereo imaging
KRK: 5 inchers are possibly the worst monitors I've heard. Boxy, no subbass, hyped midbass. This will not help you make music that will sound good on other bad speakers because there are infinite other ways for other peoples speakers to sound bad. 8 inch version is better, but imo a not very good speaker overall - not particularly detailed, not particularly flat, not even particularly pleasant to listen to, obviously bad directivity...
Mackie: have only heard the 8 inch version, which is absolutely horrible - inflated bass, no mids. For this reason alone I'd be very cautious, but then again, the MK2 series was good (both 5 inch and 8 inch, 6 inch didn't exist), so maybe they haven't screwed up the smaller ones.