The all-in-one printer named the best at least 7 times for 2 years

Source: HP official website

• Functions: Print, copy, scan, fax, email email
• Automatic duplex printing
• Bluetooth® Low-Energy for HP Roam for Business
• Energy efficiency: CECP; ENERGY STAR® qualified; EPEAT® Silver
• Enhanced security: Secure Boot, Secure Firmware Integrity, Runtime Code Integrity, password-protected EWS, secure browsing via SSL/TLS 1.0, TLS 1.1, TLS 1.2, etc. 
• Mobile Printing Capability: HP Smart App, HP ePrint, Apple AirPrint™, Mobile Apps, Mopria™ Certified, Wi-Fi® Direct Printing, Google Cloud Print™
• Print Speed Black/ Color: Up to 28 ppm (pages per minute)
• Up to 50,000 pages monthly duty cycle
• 4.3″ intuitive touchscreen Color Graphic Display (CGD)
• Automatic paper sensor: No
• Paper trays: 2
• Paper handling input: 50-sheet multipurpose tray, 250-sheet input tray, 50-sheet Automatic Document Feeder (ADF)
• Paper handling output, standard: 150-sheet output bin
• Dimensions: 16.4” x 18.6” x 15.7”/ 41.65cm x 47.24cm x 39.87cm
• Weight: 51.6 lbs/ 23.4 kg

Source: Comments on ebay.com

Pros: 

• Has its email address after configuring so people can send documents from their email addresses to that of the printer’s.
• Connectivity is reasonably simple with USB or wifi on PC and Mac.
• Produces fast and excellent quality printing for large quantities.

Cons:

• May be slow when printing the first page, particularly when there are multiple print jobs. 
• May be challenging to set up for some people as it does not provide an installation CD. 

Source: Canon official website

• Wireless 4-in-1: Print, copy, scan, fax
• Auto 2-Sided Printing
• Energy Star®, EPEAT Silver
• 5,000 Page Duty Cycle
• Includes two bonus black (PGBK) ink bottles.
• With a high page yield print up to 6,000 black / 7,700 color pages per ink bottle set.
• Wireless direct connection capable
• Wireless connect capable
• AirPrint® makes it easy to print right from iPhone®, iPad®, and Mac.
• MOPRIA® PRINT SERVICE makes it easy to print from Android devices.  
• Printer Dimensions (Closed): 15.9″ (W) X 14.6″ (D) X 9.3″ (H)/ 40.4cm (W) X 37.1cm (D) X 23.6cm (H)
• Weight: 17.8 lbs./ 8.1 kgs

Source: Comments on ebay.com

Pros: 

• Comes with a setup CD.

• Its Ink tank should be economical to use, although the printer’s initial cost can be high.

• Easy to set up and operate.

Cons:

• Does not scan both sides of a page through its paper feeder.
• The viewing screen can be difficult to read as it is small and has no backlight. 

Source: Epson official website

• Saves up to 80 percent with low-cost replacement ink bottles, compared with standard-capacity color laser toner cartridges.
• PrecisionCore® Heat-Free Technology delivers high-volume, print-shop-quality output.
• Epson® DURABrite® pigment-based ink delivers vibrant borderless prints up to 8.5″ x 14″. 
• The replacement ink set includes enough ink to print up to 6,000 pages. 
• Features a 500-sheet front tray paper capacity and rear specialty paper feed. 
• Comes with a 4.3″ color touchscreen.
• Hands-free, voice-activated printing.
• Dimensions: 16.7″ x 32.4″ x 18.1″/ 42.4cm x 82.3cm x 46cm
• Weight: 39.2 lbs/ 17.8kgs

Sources: PCMag, Tom’s Guide

Pros:

• Very low ink costs

• Fast document feeder

• Terrific print quality

• Large, 4.3″ color touchscreen

Cons: 

• High initial purchase cost
• Has paper feed issue sometimes

Source: Brother official website

• Print wirelessly from desktop, laptop, mobile devices, and NFC. 
• Print speeds up to 25 ppm and scan speeds up to 29 ipm (impressions per minute) black and 22 ipm color. 
• Automatic duplex (2-sided) printing.
• The 30-sheet capacity multipurpose tray is helpful for printing on envelopes, letterhead, and alternative media.
• The 250-sheet paper tray adjusts for letter or legal paper to help minimize paper refills. 
• 3.7″ color touchscreen LCD.
• Works with cloud apps: Dropbox, Google Drive™, Evernote, OneNote, and more.
• Versatile connection options: Built-in wireless, wifi Direct®, USB interface.
• Up to 30,000 pages maximum monthly duty cycle. 
• Recommended monthly print volume: Up to 1,500 pages
• Standard Memory: 512MB
• Feature toner save mode
• Unit dimensions: 16.1” W x 20.0” D x 16.3” H/ 40.9cm x 50.8cm x 41.5cm
• Unit weight: 53.9 lbs/ 24.44 kg

Source: Comments on Amazon

Pros:

• Easy to set up and use. 
• Economical. 
• Scans and prints quickly and with ease. 

Cons:

• Cartridge replacements can be expensive.
• The number of distinct color combinations the machine can print is very limited.
•  Graphics and photo printouts may need to be of better quality.