I'll propose that.

https://en.wikipedia.org/wiki/Date_Masamune
'An outstanding tactician, he was made all the more iconic for his missing eye, as Masamune was often called dokuganryū (独眼竜), or the "One-Eyed Dragon of Ōshu".'

gg5: a one-eyed hero.
saito: (Literally) a one-eyed dragon; (commonly) a one-eyed man

also in daijr/s, koj, and shinmeikai. 

Google N-gram Corpus Counts
╭─ーーーーーーー─┬────────┬───────╮
│ 独眼竜　　　　 │ 31,608 │ 78.6% │
│ 独眼龍　　　　 │  7,117 │ 17.7% │
│ どくがんりゅう │  1,487 │  3.7% │
╰─ーーーーーーー─┴────────┴───────╯

Perhaps this needs an entry in JMdict as well

@@ -5,0 +6,3 @@
+</k_ele>
+<k_ele>
+<keb>独眼龍</keb>
@@ -12 +15,2 @@
-<gloss>Dokuganryū</gloss>
+<gloss>Dokuganryū (nickname of Date Masamune)</gloss>
+<gloss>One-Eyed Dragon of Ōshu</gloss>

 ryuu to ryū conversion
-*- via bulkupd.py -*-

@@ -12 +12 @@
-<gloss>Dokuganryuu</gloss>
+<gloss>Dokuganryū</gloss>