How does かもしれない integrate into this sentence


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<https://www.docdroid.net/oraqSdS/img-20170830-0001-new.pdf>

The sentence is from 21-22:
聖人君子か大うそつきか、または自分がエラーをしていることに気が付いていないか、忘れてしまっている一番困ったひと **かもしれない** 。

First, I wouldn't have a problem with this sentence if the bold かもしれない was
か+も+知れない, but since the kanji is lacking I guess it is just かもしれない indicating
that the speaker feels very unsure about smthg..

I interprete the か after 大うそつきか etc. as the か marking an indirect question.
Since there is no question word like なに どう etc I'd expect かどうか but there
already was the case that かどうか wasn't used and instead just か has been applied
(I asked about this here and I was told that it was perfectly normal that this
could happen).

Now, here my translation: "It could be a perfect person or a big liar, or
someone who doesn't notice the mistakes he makes himself, or a person who is
troubled by forgetting (forgetfulness?) the most."

What's also confusing me is that 困ったひと **かもしれない** lacks another か between
かもしれない and ひと. I'd say that 困った人 also belongs to this long chain of indirect
questions. I've never learnt that the last part of such a chain could omit its
か. But maybe I got it wrong in the first place, thats why Im asking ^^




> 聖人君子 **か** 大うそつき **か** 、または自分がエラーをしていることに気が付いていない **か**
> 、忘れてしまっている一番困ったひとかもしれない。

These か's mean "or".  
かもしれない means "might be".

The basic construction of this sentence is:

> AかBか、またはCか、Dかもしれない。"It might be A, B, C, or D."

A = 聖人君子 a perfect person  
B = 大うそつき a big liar  
C = 自分がエラーをしていることに気が付いていない  
(he) hasn't noticed that he made mistakes  
D = (自分がエラーをしていることを)忘れてしまっている一番困ったひと  
The most troublesome/hopeless person who has forgotten that he made mistakes

「忘れてしまっている」 is a relative clause modifying 「（一番困った）人」.  
The object of 「忘れてしまっている」 is 「自分がエラーをしていること」. "Has forgotten that he made
mistakes."

"It could be a perfect person, a big liar, or someone who doesn't notice that
he made mistakes, or the most troublesome/hopeless person who has forgotten
that he made mistakes."

* * *

I think it could also be interpreted this way:

> AかBか、またはCかもしれない。"It might be A, B, or C."

A = 聖人君子 a perfect person  
B = 大うそつき a big liar  
C = 自分がエラーをしていることに気が付いていないか、忘れてしまっている一番困ったひと  
The most troublesome/hopeless person who hasn't noticed or has forgotten that
he made mistakes.

「自分がエラーをしていることに気が付いていないか、忘れてしまっている」 is a long relative clause modifying
「（一番困った）人」.

"It could be a perfect person, a big liar, or the most troublesome/hopeless
person who doesn't notice or has forgotten that he made mistakes."

