1. I actually thought it was some kind of sentient machine, you should reconsider the use of "literal"
2. What do you mean "Basically Goku"? Goku is pretty strong, but he has a lot of options for short, medium and long range attacks. Plus Goku is rarely stand-offish, he is kinda Oaffish.
3. I like highly durable characters that have durability as their main strong point. You can build them in many ways, like for example a determinator who needs to be smart because as durable as he is, he can't dish as much damage as he can take. Or maybe he is a cross-counter artist, taking damage waiting for his window of opportunity to strike. He could be a protector and is the first to jump and take damage, or he could be an arrogant warrior who thinks that never getting injured seriously is the same as being actually strong, until he gets his ass served and learns a valuable lesson. As rigid as the archetype seems, it has a lot of versatility depending how you use it.
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One of my favorite "tank" characters is Noh Gajang from "Peerless Dad". In a world of kung-fu mastery and technique, he wins by being harder than steel and taking hits nobody in their right mind would do and he keeps getting up because he knows he needs to protect his children. He is an uber badass nigh-unkillable warrior, but even like that he is a small fish in a much bigger pond, as he can block certain type of attacks, while others can affect him and learning how to diversify his skillset and improve his failings is part of his journey.