Is there any list of irregular adjectives that don't suit the Adjektivdeklination chart(rules)? (My question is not about Komparativ and Superlativ adjective forms)
There are surprisingly few irregular German adjectives, but there are some. First, gut has irregular comparatives: besser and besten. Others such as stark add an umlaut in comparatives. One adjective, hoch, has an irregular attributive form hoh-. I don't know if that's the only one of that type, and it's not much of a change. The declension rules work for hoh-, you just start with a different stem.
To add to the existing answer, there are also some invariant adjectives in German. Those adjectives always have the same form. Some adjectives are really nouns, for example "extra", "klasse", "scheiße", "1a" (all of them colloquial), some are prefixes like "trans", "hetero", "cis". Since those two classes of words can be put before a noun, they work like adjectives. As they are consired adjectives, they are written separately and in lower case. For example:
ein klasse Stürmer, ein cis Mann, ihr Stürmer ist klasse
Another class of invariant adjectives is formed of colors. The colors "lila" and "rosa" are also invariant.
ein rosa Stift, ein lila Papier
In colloquial speech, they sometimes are declined normally. To break hiatus, an "n" is inserted:
ein rosaner Stift, ein lilanes Papier
See also the linked question about invariant adjectives.