What is another word for most true-hearted?
Pronunciation: [mˈə͡ʊst tɹˈuːhˈɑːtɪd] (IPA) 
Most true-hearted is a phrase used to describe someone who is exceptionally loyal, genuine, and sincere in their actions and words. There are several synonyms that could be used to describe a person who embodies these traits. For instance, the words faithful, trustworthy, reliable, devoted, and staunch all convey a sense of unswerving loyalty and dedication. Similarly, sincere, candid, authentic, and honest all imply a genuine and unfaltering sense of integrity and truthfulness. In essence, anyone described as most true-hearted is someone who is incredibly trustworthy and committed and is a valuable asset to those around them.
