I've added the second 2003 Transit of Mercury from the viewpoint that we may have seen it through telescopes. Also the 2004 and 2012 Transits of Venus.
I must admit I'm rather a novice at having constructed these. I wish I was able to say from what point on Earth these transits were being viewed from but I don't know how to control that. What might be intersting is a small tutorial on just how to construct various transits. I notice that some use a Follow and some use a SyncOrbit. I'm sure each has its merits but I don't know enough to say what.
I'll admit what I did is that once I got the 2003 Transit of Mercury looking right, I just zoomed the clock up to 2004 and 2012, centered the Sun and then captured the url! Not very scientific but they look cool and its fun.
What I'd also like to add to the collection is a transit of Earth from the viewpoint of Mars.
Also I'd like to note that I didn't keep track of the authors of these other transits

9 BC Mars Transits Saturn
cel://SyncOrbit/Sol:Earth/-009-01-30T15:07:38.65?x=b6U30VXODE2vDA&y=fmT5gsP5eAc&z=yv0M7f8XF8X5/////////w&ow=0.510458&ox=0.167526&oy=0.838680&oz=-0.089354&track=Sol:Saturn&select=Sol:Mars&fov=0.020198&ts=0.001000&rf=71559&lm=0
1170 Mars Transits Jupiter
cel://SyncOrbit/Sol:Earth/1170-09-12T20:18:14.32?x=yvoT/aLCsVbNDA&y=mn+PmotGnwE&z=pPpga7ZVuOD9/////////w&ow=0.997626&ox=0.005229&oy=0.068036&oz=0.009262&track=Sol:Jupiter&select=Sol:Mars&fov=0.028421&ts=0.010000&rf=71559&lm=0
1613 Jupiter Occults Neptune
cel://Follow/Sol:Earth/1613-01-03T16:47:52.70?x=1HuwloUFFZy4DA&y=ff5enH24OwM&z=drVFTFeLAE/x/////////w&ow=0.676576&ox=-0.182222&oy=-0.695147&oz=-0.160660&track=Sol:Jupiter&select=Sol:Neptune&fov=0.014354&ts=0.001000&rf=71559&lm=0
1737 Venus Occults Murcury
cel://SyncOrbit/Sol:Earth/1737-05-28T21:42:04.61?x=6CR103orJHu4DA&y=kIx1jVEUx/3//////////w&z=GJpyMN1Q5ioP&ow=0.996660&ox=-0.021131&oy=-0.026240&oz=-0.074396&track=Sol:Venus&select=Sol:Venus&fov=0.062038&ts=-0.000010&rf=6031&lm=20
1818 Venus Transits Jupiter
cel://SyncOrbit/Sol:Earth/1818-01-03T21:42:05.68?x=UUXQPiiUQ4C5DA&y=uN98qAKcqwE&z=QfOhSwYJLQjx/////////w&ow=-0.007477&ox=-0.075911&oy=0.997082&oz=-0.002889&track=Sol:Jupiter&select=Sol:Venus&fov=0.031334&ts=0.000000&rf=6095&lm=0
2003 Transit of Mercury
cel://SyncOrbit/Sol:Earth/2003-05-07T07:41:24.33324?x=KN6nhSrCOqiyDA&y=vhDgDu+JIA&z=n5IfaCAQ6IcL&ow=-0.384841&ox=-0.338569&oy=-0.154236&oz=0.844677&track=Sol&select=Sol&fov=0.585285&ts=0.000000&rf=771&lm=2
cel://Follow/Sol:Earth/2003-05-07T06:56:28.79538?x=aIONQXfW/6WyDA&y=ljE5m0PIAw&z=p/Zac0dIaIYL&ow=0.928076&ox=0.000104&oy=0.372390&oz=-0.000255&select=Sol&fov=1.410327&ts=1.000000<d=0&rf=36755&lm=-382
2004 Transit of Venus
cel://Follow/Sol:Earth/2004-06-08T05:20:19.64132?x=UFxMRnP33j+6DA&y=C3gx0VJsDQ&z=kFvMO7BESKwP&ow=0.994234&ox=0.000038&oy=0.107231&oz=-0.000294&select=Sol&fov=1.410327&ts=1.000000<d=0&rf=36755&lm=-382
2012 Transit of Venus
cel://Follow/Sol:Earth/2012-06-06T04:02:55.76576?x=UNy8F3Xk4LO5DA&y=ztcEva7nGw&z=8cWct1Ij34kP&ow=0.991973&ox=0.000051&oy=0.126450&oz=-0.000291&select=Sol&fov=1.410327&ts=1.000000<d=0&rf=36755&lm=-382
Future Transits of Mars
cel://Follow/Sol:Earth/2223-12-02T12:21:32.53308?x=oBs0Xv1x9+jDDA&y=02YPR0JiI/7//////////w&z=VWJhTmStILbx/////////w&ow=0.541795&ox=-0.003295&oy=0.840378&oz=0.014603&select=Sol:Mars&fov=0.016192&ts=1.000000
cel://Follow/Sol:Earth/2478-08-29T23:07:53.07643?x=ECQU6KdTwpfLDA&y=PT/eYDhp1AE&z=rd7qQL9uP9YH&ow=0.809539&ox=-0.021190&oy=-0.586496&oz=-0.014844&select=Sol:Mars&fov=0.009467&ts=1.000000
cel://Follow/Sol:Earth/2959-03-09T17:28:29.50295?x=QI5qiFNWhHGvDA&y=aoH4i3Colv3//////////w&z=BVlsKCaDpYL5/////////w&ow=0.572893&ox=0.006895&oy=0.819587&oz=0.004883&select=Sol:Mars&fov=0.009941&ts=1.000000