The Chicago Manual of Style gives these recommendations for hyphenating compounds formed with prefixes:

Compounds formed with prefixes are normally closed, whether they are nouns, verbs, adjectives, or adverbs. A hyphen should appear, however,

1. before a capitalized word or a numeral, such a sub-Saharan, pre-1950;
2. before a compound term, such as non-self-sustaining, pre–Vietnam War (before an open compound, an en dash is used; see 6.80);
3. to separate two i’s, two a’s, and other combinations of letters or syllables that might cause misreading, such as anti-intellectual, extra-alkaline, pro-life;
4. to separate the repeated terms in a double prefix, such as sub-subentry;
5. when a prefix or combining form stands alone, such as over- and underused, macro- and microeconomics.

In your example, control freak is an open (non-hyphenated) compound, and so would be compounded with the prefix non- as non-control freak (using an en dash, although an ordinary hyphen would be acceptable in email, or other such places where typographic niceties are overlooked).

The Chicago Manual of Style gives these recommendations for hyphenating compounds formed with prefixes:

Compounds formed with prefixes are normally closed, whether they are nouns, verbs, adjectives, or adverbs. A hyphen should appear, however,

1. before a capitalized word or a numeral, such a sub-Saharan, pre-1950;
2. before a compound term, such as non-self-sustaining, pre–Vietnam War (before an open compound, an en dash is used; see 6.80);
3. to separate two i’s, two a’s, and other combinations of letters or syllables that might cause misreading, such as anti-intellectual, extra-alkaline, pro-life;
4. to separate the repeated terms in a double prefix, such as sub-subentry;
5. when a prefix or combining form stands alone, such as over- and underused, macro- and microeconomics.

In your example, control freak is an open (non-hyphenated) compound, and so would be compounded with the prefix non– as non–control freak (using an en dash, although an ordinary hyphen would be acceptable in email, or other such places where typographic niceties are overlooked).