The supporting character's harem is very normal - Chapter 212 It’s interesting, but also very stimulating.

Rotten! Rotten! Rotten!
Yin Li was fired by the company and dumped by her boyfriend. When she woke up, she found that she had traveled to the orc world. He thought that with the brains of modern urbanites, he could make a fortune, but he found that courtship alone was enough to stumped him.
The blond lion orc likes bamboo horses, and the black-haired and yellow-skinned black bear orc has long been engaged… Looking left and right, only the hyena orc who looks exactly like his ex-boyfriend sends a “signal” of love to him.
However, it is rare to come to another world, but also to eat grass? Yin Li said: “Ugly refused!”

- Description from novelbuddy

Ling Xiao was a powerful martial expert who fell in battle and was unexpectedly transmigrated into another world. He began life anew in the body of a boy with the same name, a fallen genius of the Ling Family whose cultivation had been crippled in a surprise attack, and son to a father who had also suspiciously been crippled under similar circumstances. Armed with knowledge from his previous life, Ling Xiao aim to restore his strength and establish his place at the top of this new world

- Description from Novelupdates

The story revolves around Charles Karino, a Levaamu Empire mercenary aerial pilot who mans the twin seater reconnaissance seaplane Santa Cruz. One day, he receives a preposterous assignment: to fly solo over 12,000 kilometers of enemy waters to protect a girl named Fana del Moral. Fana happens to be the next in line to the empire’s throne and a girl possessing beauty “equal to 5,000 beams of light.”

This is a standalone book. There’s another series under the name “To Aru Hikuushi e no Koiuta” (Love Song for a Certain Pilot) set in the same world, but in a completely different place and with different characters.

– Ulrezaj @ Mazui

Adapted to anime as “The Princess and the Pilot”

Heavenly emperors reigned supreme in the cultivation world but there were still existences beyond the power of heavenly emperors. They were termed as sages as they had mastered the laws of mortal world.

The prince of Zhan dynasty had once reached that epitome of cultivation world. At the mere age of thirty, he had reached the heavenly emperor realm. Then he attained that legendary realm before turning fifty. Thus, he was hailed as an unprecedented genius never before seen in this world.

When he was basking in the glory of his achievement, fate played a cruel joke on him. He got stabbed by his fiancée in his marriage day. Powerful enemies appeared out of now here and Zhan dynasty got attacked from every direction.

His father got killed Infront of him and many of his relatives perished along with him. He wanted to charge towards the battle field but the injury given by his fiancée proved fatal to him. He perished despite his unwillingness.

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When he opened his eyes he was already a seventeen year young man who shared the same name with his previous life. With his previous memory as a sage and the inheritance of Evil emperor as guide, he aimed to reach the top again.

Since then the most cursed art of wife stealing reappeared again and an unprecedented genius appeared in the path of dual cultivation.