Feed(Aggre)gator takes a list of RSS feeds and creates a single list of RSS items from those feeds to be displayed as a widget. You can select how many items you want to display and whether you want to show the entries chronologically or you want to show the latest entries from each feed listed.
You can also opt to display the date associated with the RSS item as well as the author of the item.
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feedgator

Feed(Aggre)gator merges a group of RSS feeds into a single widgetized list.

shawfactor

Adds a simple to use [rss] shortcode with a couple of options:
<ul>
<li>feed: to put in the feed URL</li>
<li>num: to specify the number of items to show, defaults to 5</li>
<li>template: a wordpress template that will handle the shortcode output (defaults to default.php, you can use the two provided or follow the instructions on creating your own</li>
</ul>
Example use:
[lh_rss_shortcode feed=”https://shawfactor.com/feed/” num=”10″ ]
Or:
[lh_rss_shortcode feed=”https://shawfactor.com/feed/” num=”5″ template=”excerpt.php”]

LH RSS Shortcode

A simple plugin to display RSS feeds in posts and pages using a shortcode.

feedgator vs LH RSS Shortcode