Tā suīrán shì dà lǎobǎn, què píngyìjìnrén, cóng bù bǎi jiàzi.
Even though he's a big boss, he's down to earth and never puts on airs.
Tips
memory
平 (flat/level) + 易 (easy) + 近 (close) + 人 (people) — someone who is 'flat and easy to approach,' like level ground that anyone can walk on without difficulty.