The best replacement for legionnaire is centurion.

The best alternatives to legionnaire are rated as following:
★★★★★  centurion
★★★★★  legionary
★★★★  hoplite
★  medieval knight

Your alternative for legionnaire is not listed? Suggest!
Speaking about legionnaire, one probably shouldn't forget about staff of the master.

Other search terms related to legionnaire and their ratings are:
★★★★★ staff of the master
You have in mind a companion for legionnaire and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of legionnaire in all years. Click on graph for more.
legionnaire
centurion
legionary