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Sounds like you'd just want to use a Join tool and select to join by record position, but could also join by common ID. You can then rearrange the field order down below.
There's a couple ways you could do it. Most basically you can select a field in the join tool and use the up/down arrows to rearrange, but that's a lot of fields to work with.
There's a Sort Fields that has been created which you can download and plug in and sorts fields into alphabetical order - which would get your fields next to each other, but the overall order may change: http://www.chaosreignswithin.com/2014/09/blog-macro-pack-2014-q3-release.html
Can reference this post as well: https://community.alteryx.com/t5/Alteryx-Designer-Discussions/How-do-I-automatically-Order-Columns/t...