As other have suggested a 8" or 10" would probably be a better match, but that does not mean it cannot be made to work and sound nice. A 4-way also has it own challenges.
EDIT: this topic seems relevant:
https://www.diyaudio.com/community/t.../#post-7302798
That looks like a very good mid.
EDIT2: also very relevant, and you could probably just replace the two 8" woofers with a single 15":
https://vcllabs.com/vcl-ex27/