Seikoku no Dragonar, Tora Kiss: A School Odyssey Recommendations
both male protagonist are seen as the lowest students at their special academy. Although they both have beast/dragon (Tora Kiss/Dragonar) that are really powerful and take humanoid shape is which very unique. the protagonist also accumulate a harem
Both protagonist are look down by everyone around them.
In Tora kiss the protagonist is the lowest ranking student while in seikoku his dragon wasn't born yet.
Both manga's people have a companion for each person that they work with and do battles with.
Also, in both manga the protagonist has hidden talent and strength no-one knows in the beginning!