Welcome,
Mumriken.
That's quite a number of complex topics for a single post!
The questions you raise are certainly intriguing, and they've brought quite a bit of discussion on this forum over the years.
Instead of trying to address them all in this thread, I suggest looking into some of these older relevant threads.
Regarding Tom Bombadil:
http://forum.barrowdowns.com/showthr...light=Bombadil
and
http://forum.barrowdowns.com/showthr...light=Bombadil
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Ungoliant:
http://forum.barrowdowns.com/showthr...ight=Ungoliant
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Beorn:
http://forum.barrowdowns.com/showthr...ighlight=Beorn
and
http://forum.barrowdowns.com/showthr...ighlight=Beorn
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Goldberry:
http://forum.barrowdowns.com/showthr...ight=Goldberry
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The Dead Men and their Curse:
http://forum.barrowdowns.com/showthread.php?t=16404
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Hobbit origin:
http://forum.barrowdowns.com/showthr...hlight=hobbits
and
http://forum.barrowdowns.com/showthr...hlight=hobbits
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Wraiths:
http://forum.barrowdowns.com/showthr...ht=Ringwraiths
I hope that helps.