Apologies if these suggestions have been given earlier in the thread but I'm too lazy to read through it all
I'm an avid reader and can highly recommend The Black Fleet trilogy by Joshua Dalzelle. The first two of the next trilogy are also available called the expansion wars.
Also the first Star Crusaders trilogy by Michael G Thomas is good. The first book in particular is just brutal ass kicking in space and on the ground.
Gridlinked by Neil Asher is also worth a read, but the following books don't live up as much, unfortunately
Then we have the pinnacle of Sci fi writing in the Culture series by the late Iain M Banks. If you haven't read any of these, do so. Immediately.