You may have read that in Victorian times it was not unusual for tartans to be woven in mourning colors, that is, the usual tartan proportions but in black and white, along with modern, ancient, hunting, etc. or so I have heard.

I don't think it is at all morbid. Of course in Victorian times there was a more sentimental custom, or even cult, of mourning, the mortality rates were higher than they are today, and people lived closer to their relatives and friends and so attended more funerals. Also, mourning was worn for months or years. Many of us today are are reaching an age when we go to more funerals that younger people do. It might be wise to have a sedate black and white kilt to wear, rather than, say, one's usual bright red and yellow tartan.

I remember reading somewhere that the black and white Menzies tartan is sometimes used in funeral kilts, but don't remember the source or how authoritative it was.

All four of the ones you show are tasteful and appropriate, though the last is a bit busy, as you say.