As higher resolution displays have become more common since other answers were given here, and also a wider variety of resolutions has become more common, this answer adapts from resolutions available at wallpaperswide.com (which is very comprehensive), including including mobile and multiple monitor (up to 3 monitors wide) configurations.
[EDIT: I at first wrote that I obtained this list from wallpapers.com; that is incorrect.]
For my purposes I also wanted the aspects in this list, so it is in CSV format: width,height,aspect (x:1):
width,height,aspect (x:1)
23040,4320,5.33
15360,2880,5.33
11520,2160,5.33
10662,1999,5.33
8640,1620,5.33
7680,1440,5.33
7200,1350,5.33
6144,1152,5.33
5760,1080,5.33
4800,900,5.33
4098,768,5.33
3840,720,5.33
3840,768,5.00
2400,480,5.00
23040,4800,4.80
15360,3200,4.80
11520,2400,4.80
8640,1800,4.80
7680,1600,4.80
5760,1200,4.80
5040,1050,4.80
4320,900,4.80
3840,800,4.80
9000,2000,4.50
8208,1824,4.50
6480,1440,4.50
6000,1333,4.50
5760,1280,4.50
4320,960,4.50
3456,768,4.50
19200,4800,4.00
12288,3072,4.00
9600,2400,4.00
8400,2100,4.00
7680,1920,4.00
6144,1536,4.00
5760,1440,4.00
5040,1260,4.00
4800,1200,4.00
4320,1080,4.00
4200,1050,4.00
3840,960,4.00
3456,864,4.00
3072,768,4.00
15360,4096,3.75
11250,3000,3.75
7680,2048,3.75
3840,1024,3.75
15360,4320,3.55
10240,2880,3.55
7680,2160,3.55
7108,1999,3.55
5760,1620,3.55
5120,1440,3.55
4800,1350,3.55
4096,1152,3.55
3840,1080,3.55
3200,900,3.55
2732,768,3.55
2560,720,3.55
2048,576,3.55
1920,540,3.55
2560,768,3.33
1600,480,3.33
15360,4800,3.20
10240,3200,3.20
7680,2400,3.20
5120,1600,3.20
3840,1200,3.20
3360,1050,3.20
2880,900,3.20
2560,800,3.20
2304,720,3.20
1920,600,3.20
5600,1800,3.11
6000,2000,3.00
5472,1824,3.00
4320,1440,3.00
4000,1333,3.00
3840,1280,3.00
2880,960,3.00
2304,768,3.00
12800,4800,2.66
8192,3072,2.66
6400,2400,2.66
5600,2100,2.66
5120,1920,2.66
4096,1536,2.66
3840,1440,2.66
3360,1260,2.66
3200,1200,2.66
2880,1080,2.66
2800,1050,2.66
2560,960,2.66
2304,864,2.66
2048,768,2.66
1600,600,2.66
10240,4096,2.50
7500,3000,2.50
5120,2048,2.50
2560,1024,2.50
3840,1600,2.40
3440,1440,2.38
5120,2160,2.37
2560,1080,2.37
7680,4320,1.77
5120,2880,1.77
3840,2160,1.77
3554,1999,1.77
2880,1620,1.77
2560,1440,1.77
2400,1350,1.77
2048,1152,1.77
1920,1080,1.77
1600,900,1.77
1366,768,1.77
1334,750,1.77
1280,720,1.77
1136,640,1.77
1024,576,1.77
960,540,1.77
854,480,1.77
640,360,1.77
480,272,1.76
1024,600,1.70
1280,768,1.66
800,480,1.66
400,240,1.66
7680,4800,1.60
5120,3200,1.60
3840,2400,1.60
2880,1800,1.60
2560,1600,1.60
1920,1200,1.60
1680,1050,1.60
1440,900,1.60
1280,800,1.60
1152,720,1.60
960,600,1.60
3000,2000,1.50
2736,1824,1.50
2160,1440,1.50
2000,1333,1.50
1920,1280,1.50
1440,960,1.50
1152,768,1.50
960,640,1.50
480,320,1.50
6400,4800,1.33
4096,3072,1.33
3200,2400,1.33
2800,2100,1.33
2560,1920,1.33
2048,1536,1.33
1920,1440,1.33
1680,1260,1.33
1600,1200,1.33
1440,1080,1.33
1400,1050,1.33
1280,960,1.33
1152,864,1.33
1024,768,1.33
800,600,1.33
640,480,1.33
320,240,1.33
5120,4096,1.25
3750,3000,1.25
2560,2048,1.25
1280,1024,1.25
220,176,1.25
3840,3840,1.00
2732,2732,1.00
2560,2560,1.00
2048,2048,1.00
1280,1280,1.00
1024,1024,1.00
176,220,0.80
600,800,0.75
480,640,0.75
240,320,0.75
2048,2732,0.74
768,1152,0.66
640,960,0.66
320,480,0.66
800,1280,0.62
768,1280,0.60
480,800,0.60
240,400,0.60
2160,3840,0.56
1440,2560,0.56
1080,1920,0.56
720,1280,0.56
540,960,0.56
480,854,0.56
360,640,0.56
272,480,0.56