Looking for a great front ported bookshelp speaker recommendation

Fischer & Fischer SN 70's. HANDS DOWN. 

Pro AC Response D2 or D2 R should fit the bill https://www.stereophile.com/content/proac-response-d2r-loudspeaker

You didn’t state the interior dimensions of your cabinet. Just be sure to get the dimensions of any prospective front ported or non-ported bookshelf speakers to ensure they will fit inside your cabinet. Obviously, think about setting them on some rubber feet (at least) if not something better to isolate them from the cabinet. And if possible, keep the front baffle a bit outside of the cabinet so the edges of the cabinet don't cause acoustic diffraction. As others have suggested, in such a large room, eventually getting them on proper stands will improve everything an order of magnitude and let you position the tweeters at ear height.

I have same setup. I tried Mirages. Good. Guru's better. Linn Sara Isobarik, good as well. But the best I found and still use are Audio Note K. I have them horizontal on iso puck minis.

NHT Hifi sells their C1 and C3 acoustic suspension speakers (no ports) that are designed for book shelf and wall mount use.  These speakers sound good and are reasonably priced. You might want to consider adding a subwoofer if you have to use speakers that are on the smaller end of the spectrum.