Modifiers matching grump:

• gruff,
• rich,
• grouchy,
• covetous,
• arrogant,
• impatient,
• misanthropic,
• wealthy,
• penny-pinching,
• greedy,
• principled,
• ill-tempered,
• fastidious,
• grizzled,
• miserly,
• jealous,
• condescending,
• mean,
• heartless,

Simple categories matching grizzled:

• person,
• grump,
• director,
• pianist,
• actor,
• cowboy,
• musician,
• warrior,
• guitarist,