300 is a good number!
i automatically think of some lesser know Ssadiqim.
Hhanukh : "after he became the father of Mthushalahh, Hhanukh walked faithfully with God 300 years and had other sons and daughters. Altogether,Hhanukh lived a total of 365 years. Hhanukh walked faithfully with G-d; then he was no more, because G-d took him away." Breshith 5:22-24
Gide3on : "There HaShem told him, “Separate those who lap the water with their tongues as a dog laps from those who kneel down to drink.” 300 of them drank from cupped hands, lapping like dogs. All the rest got down on their knees to drink.
HaShem said to Gide3on, “With the 300 men that lapped I will save you and give the Midianites into your hands. Let all the others go home.” So Gide3on sent the rest of the men of Yisra'el to their tents but kept 300, who took over the provisions and trumpets of the others." Shofttim 7:5-8
" וַיִּתְקְעוּ שְׁלֹשֶׁת הָרָאשִׁים בַּשּׁוֹפָרוֹת, וַיִּשְׁבְּרוּ הַכַּדִּים, וַיַּחֲזִיקוּ בְיַד-שְׂמֹאולָם בַּלַּפִּדִים, וּבְיַד-יְמִינָם הַשּׁוֹפָרוֹת לִתְקוֹעַ; וַיִּקְרְאוּ, חֶרֶב לַיהוָה וּלְגִדְעוֹן" Shofttim 7:20
'avishay: "And 'avishay, the brother of Yo'av, the son of Sseru'ah, was chief of the three. And he lifted up his spear against 300 and slew them, and had a name among the three."2 Shmu'el 23:18