how to show appreciation towards someone except 謝謝

感激帮忙
多谢

duōxiè ,
tài xièxie nín le ,
nín xīnkǔ le,

非常感谢
不用谢

多谢，非常感谢

Hi, points)

謝謝
多謝多謝
您費心了
萬分感謝
大恩不言謝
滴水之恩，當湧泉相報
......

My advice for you going forward would be to search up the character on yabla, as it shows other words made with those characters and example usage in many cases. For example;

非常感谢 - fēichánggǎnxiè (Thank you very much)
特别感谢 - tèbiégǎnxiè (Special thanks - seems to be used in speeches from the examples)
多谢 - duōxiè (Many thanks)
感谢 - gǎnxiè (Express thanks)

Then you should follow up and ask where is this used, is it used in normal speech, maybe search up the characters in novels and see what context it is used in. Then if it's not archaic or is an innuendo or anything just use the one you like, you have favourites in english, why should it be different in Chinese. Some people say you're welcome, some people say no problem, some people say my pleasure, it is all up to the indivdual.

感恩
感謝
麻煩您了
有勞您了
辛苦您了
多謝

You can also use a very formal phrase 麻煩您了= Sorry for the bother.

Same to me 😅