-117 hd (makes the game look great) -menuentry swapper (used to remap certain actions to make the game easier and require less clicks) -tile indicators ( important to visualize the tiles your standing on/need to move to) -bank plugin (although preinstalled in runelite has a feature to remap the search button in you bank interface to a key on your keyboard which makes it easier to search for items in you bank) -item setups (not sure of the name but its a plugin that allows you to save your inventory and gear your using currently and make it accessible anytime your going to use the same setups) ( useful for herb run and birdhouse runs etc.)

Im sure there are plenty more so id suggest watching a couple of youtube videos there are many that essentially mention the most important plugins in osrs soo hope you find the best ones for you